4 mm Hex Screwdriver & Bit storage base

This was created as the box the screwdriver was supplied in was poor.
v1.2 - Stores a single screwdriver and bits
v1.3 - Stores an additional screwdriver
The design has a lot of parameters in the start of the OpenSCAD file, which allows the design to be modified to some extent. The key factor is the printer allowance to get the desired fit of the bits in the base.
To assist in working out the correct size I created a test part with 0.1 mm across flat steps, I recommend you print this part a