Hex Tool Handles

So I needed a method of holding a longshanked hex nut driver in a stub handle, to be able to get under the printhead of my original Prusa i3 MK3 and be able to remove & change the nozzle on the hotend - without having to go out and buy a (costly!) dedicated tool for the job.

Rather than print the whole handle with a high-density infill (with asssociated extra filament cost), the best alternative was to produce a couple of different-length handles with interchangeable bit holders, which themselves then contain the relevant toolbit(s).

The bit holders themselves are of course printed at 60-80% or more infill, but only cost a fraction of what it would otherwise mean if the entire handle was printed at high density.

This idea means that the same handle can also be used with other toolbits, the same concept being used in most toolkits where a single handle with mulitple, interchangeable bit inserts are used.

Check out https://www.thingiverse.com/thing:3605461 for a subsequent ve