Cheap Digital calipers spare battery lid

gap should be bridgable but I printed with supports. Scale model to 1000% if it seems too small. .16mm layer height works well.

It has some ridges for some extra grippyness but you can't really feel it with a 0.4 nozzle. maybe lower line width would help. I'll also upload a version without them.

Now there's one without ridges and one with internal ridges. Should be easier to print without supports and schtuff..