This TPU insert is made to just drop into the Apache 2800 case from Harbor Freight. 

Check out my insert for the Apache 3800 (https://makerworld.com/en/models/2893248-insert-for-apache-3800#profileId-3233012)

This insert has cutouts for:

2 compact or slim-line pistols

7 magazines

1 large cutout for ear protection, ammo, and whatever else you need for the range

You can also fit standard Sharpies and pens in the infill hexagons

Pictured above is a Sig X Macro, a PSA Dagger, and Springfield Echelon Compact. The magazine cutouts are made to fit the “stack and a half ” mags somewhat loose-ish, double stack mags are pretty snug, and Glock mags take some convincing to get in and out (17 round mags may not allow the lid to close, I'm unsure). Depending on what holster you have, you can even fit the 365 in the holster if you stretch the TPU a bit (as pictured).