Minimal Ender 3 Tool Holder

I like to keep the workplace as simple as possible. Thus, this holder only contains the tools I use all the time. Also I added a slot for a micro-sd-card-adapter, since i tend to put them somewhere ... and then end up searching them...

I also widened the slots on the top end, so that tool/card slips in way easier.

Based on DantRush's great design.