here are many 3D printer tools holders and tray .
but i like this VW design.
Now its roof rack carries Pen holder , maker pen holder USB Drive , SD Card slot, Hex wrench all sizes , Screw drivers and Philips and out infront is a open tool box for extra nozzles screws PTF tubes
VW from here https://www.thingiverse.com/thing:5424986
Hex holder and screw drivers from https://www.thingiverse.com/thing:835306
And some tinkering on tinkercad Remix Marker VW Marker /
Pen holder /
tool holder for 3D Maker Use.
Remix only Roof the rest are from original maker Roof Rack for
1. USB Drive SD Cards (rear or roof)
2. Hex / Allen keys (left side of roof)
3. Screw Drivers (right side of roof)
4. Marker Pen / pen Holder(center of roof)
5. Open tool box (Front center of Roof)
The author marked this model as their own original creation.