A missing control lever is rarely lost in a dramatic fashion. It is usually sitting under a sanding stick, caught in the fold of a kitchen towel, or has rolled into that mysterious area behind the cutting mat. The best model kit part trays stop that slow bench-side attrition by giving every loose component a visible, protected place between removing it from the sprue and fitting it to the model.
For scale modellers, a part tray is not simply a small container. It is a working tool. The right one helps you separate tiny parts by construction stage, protect painted details, keep port and starboard assemblies apart, and put the correct piece back under your hand when the instructions call for it.
What Makes the Best Model Kit Part Trays?
The most useful trays suit the way you actually build. A modeller working through a 1:72 aircraft cockpit has different needs from someone assembling a 1:35 running gear set, a ship’s photo-etch railings, or a batch of railway wagon details. The common requirement is simple: parts must stay put, stay identifiable and remain easy to pick up.
Shallow compartments are usually better than deep pots for active work. You can see a landing gear door, a small antenna or a set of road wheels at a glance without rummaging. Deep containers have their place for spare parts and unused fittings, but they can turn a carefully sorted job into a miniature lucky dip.
A good tray also needs enough room around each part. If two fragile painted assemblies are touching, the tray is organising them in theory but risking damage in practice. Choose compartments that allow you to lift a component by its strongest point with tweezers or fingers, rather than pinching delicate detail.
Match the Tray Layout to the Build
Before choosing a tray, consider whether you need it to manage individual parts, sub-assemblies or a complete session’s work. One large open tray can be ideal while cleaning up a handful of wing pylons. Once those pylons have been primed, painted and fitted with decals, separate compartments become far more valuable.
Small compartments for detail work
Fine detail parts benefit from small, distinct pockets. These are particularly handy for cockpit controls, clear lenses, ship fittings, suspension pieces, track links and tabletop miniatures. A compartment should be large enough that parts do not overlap, yet small enough that a tiny piece cannot wander to a corner and disappear beneath other items.
For parts that look almost identical, assign one compartment to each step in the instructions. This is useful with left and right-handed fittings, duplicate wheel hubs, or similarly shaped armour brackets. A small label beside the tray can save a surprising amount of backtracking later.
Open sections for sub-assemblies
Larger open areas are better for assemblies that need to rest without pressure on fine details. A painted cockpit tub, locomotive bogie, ship superstructure section or tank turret needs a place where it will not be nudged every time you reach for the cement.
If you build in short evening sessions, this matters even more. Rather than leaving work balanced on a paint jar or scattered across the mat, you can place each assembly in its own section and return to it exactly as you left it. Dust protection is still worth considering for longer pauses, but an organised tray gives the model a much safer temporary home.
Dedicated space for clear parts and decals
Clear parts deserve their own compartment, away from sanding dust, metal files and loose plastic. Keep them in a clean section until you are ready to polish, mask or fit them. The same goes for decals once they are cut from the sheet: a clean, shallow tray reduces the chance of a wet decal folding onto itself or collecting debris.
Do not use the same tray section for clear parts and freshly painted pieces if there is any chance of adhesive, wash or varnish residue being present. It only takes one tacky surface to spoil a canopy or mark a gloss finish.
Choose Stability Over Novelty
A part tray that slides across the bench when you brush it with a sleeve is more irritating than useful. Look for a stable footprint and a low centre of gravity, especially if your workbench is shared with paint racks, cutting tools and a growing collection of active projects.
Weight is a trade-off. A very light tray is easy to move and store, but can shift when you are picking up fine pieces with tweezers. A heavier tray stays planted, though it takes up more space and is less convenient if you build at the kitchen table. For most permanent benches, stability wins.
Raised edges are equally practical. They act as a last line of defence when a part slips from tweezers, and they make it less likely that loose components will escape while moving the tray. The edge does not need to be tall, but it should be enough to stop a 1:700 lifeboat or a 1:76 handrail from rolling straight onto the floor.
Material and Surface Finish Matter
Smooth plastic trays are easy to wipe clean, but very smooth surfaces can let round parts roll freely. A lightly textured base gives small wheels, bombs, wheels and cylindrical fittings a little more resistance without making the tray difficult to clean. Avoid rough finishes that can snag decals, catch photo-etch or leave marks on soft paint.
For 3D-printed trays, the design matters as much as the material. Sensibly shaped compartments, rounded internal corners and a base that sits flat on the bench are all signs that the tray has been designed around actual modelling work. Tools designed by modellers tend to account for the small frustrations that generic storage often misses.
It is also worth thinking about chemical contact. A parts tray is not a mixing palette, and it should not become a parking spot for a cement-soaked brush. Keep solvents, liquid cement and strong thinners in their own holders. This protects both the tray and the parts waiting beside it.
Build a Tray System, Not a Pile of Containers
The best model kit part trays work as part of a bench routine. Keep one tray for current construction, another for painted items awaiting assembly, and a small spare tray for parts removed from the sprue ahead of time. This simple separation stops sanding debris migrating into finished work.
If desk space is tight, use only as many compartments as the current stage needs. Filling every section with parts for the entire kit can be counterproductive. You create a crowded tray, increase the risk of selecting the wrong item, and make it harder to spot what has already been completed.
A practical approach is to prepare the parts for the next two or three instruction steps, rather than a whole page. Clean them up, place them in order, and keep any relevant photo-etch or alternate options beside them. Once that section is complete, clear the tray before beginning the next one. It keeps the bench calm and gives you a useful visual sense of progress.
For complex kits, write the instruction step number on a small piece of masking tape and place it on the tray edge. It sounds basic, but it is invaluable when several assemblies are drying at once or you return after a few days away from the bench.
Avoid These Common Part Tray Mistakes
The first mistake is treating every tray as a storage box. Active parts need visibility, not depth. The second is mixing cleaned, unpainted and finished components together. Even if nothing gets damaged, you lose the clear workflow that makes trays worthwhile.
The third is leaving the tray too close to the bench edge. A stable tray can still be knocked off if it is in the path of an elbow, sleeve or airbrush hose. Give it a fixed position near the cutting mat, ideally on the side of your dominant hand but outside the main movement area.
Finally, remember that a tray cannot compensate for rushed handling. Use it as a landing area whenever you set down tweezers, remove a part from a clip, or pause to check the instructions. Those few seconds are cheaper than replacing a carpet-fed part.
At The 3D Forge, that kind of everyday bench logic is the point of purpose-built organisers, with the Forge Cat giving the final quality inspection before they head out. Choose trays that suit your scale, your available desk space and your usual build pace, then give every small part a proper place to wait. Your next session will begin with the model in order, rather than a search party under the bench.