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StashGridDesign your insert

Apache 3800 inserts.

Design separate upper and lower inserts for the Apache 3800. Arrange supported gear on each layer, then export each insert as its own STL.

All supported cases

Know the insert dimensions

Insert model dimensions in millimetres; not the case’s exterior dimensions.
InsertWidth × length × depth
Lower376 × 266 × 53 mm
Upper379 × 269 × 53 mm

These measurements come from the same case models used by the designer. They describe digital geometry, not a measured fit tolerance or a guarantee of the finished print.

Two layers, two printable files

A newly selected Apache case opens on the upper insert. Switch to Lower to work on the insert beneath it; the upper insert moves aside in the preview. Planning view keeps the same framing while you switch layers. The upper model includes handle slots so the lower insert remains accessible.

Use the Case menu to select Apache 3800. Switching cases replaces the current layout after confirmation when gear is present. Your current design is saved in this browser; there is no cloud library of designs.

Open the insert designer

Choose a matching gear profile

The shared library currently includes G17 Gen5, G17 Gen5 MOS, G17 Gen6 Standard, G19 Gen5 Compact, G19 Gen5 MOS Compact, G19 Gen5 A-CUT, G19 Gen6 Compact, G43X MOS Subcompact, G48 MOS Compact, G45 Gen5, G45 Gen5 MOS, G45 Gen6 Compact, G45 Gen5 A-CUT, G49 Gen6 Standard. Check the exact variant, attachments, and placement in the designer. Library availability does not establish physical compatibility with every case or layout.

You can move and rotate gear, undo changes, and switch between perspective and planning views. The tool checks placement against the case outline; it does not certify printer tolerances or the physical result.

Plan the print

Check both layer envelopes in your slicer: the upper and lower inserts have different widths and lengths. Export each layer separately. A printer that cannot fit an entire layer will need a split-print workflow; plan the joints and access to the lower insert before printing.

Physical print validation is still in progress. Choose a material for your intended conditions, inspect the sliced layers, and test fit before relying on the finished insert. No universal filament, support setting, or friction-fit guarantee applies to every layout.

Follow the STL-to-print guide. For saving, licensing, and other questions, read the FAQ.