SUPERPINDA offset distance helper, mounts onto 3030 extrusion

Hides away by snapping directly into any 3030 channel, on both the Mini and MK3 series. Useful if you do frequent nozzle swaps. Tested and working, good offset for the distance for first layer calibration for the SuperPINDA specifically, and snaps onto both my Mini+ and MK3S. fuchsr's height adjuster which mounts a onto a hook instead was inspiration for the idea so marked this as a remix. Print instructions Print "standing up" to avoid using supports. Use a reasonably detailed layer height like 0.2mm. Works with different sized nozzles, I printed on both 0.4mm and 0.6mm and both are fine. It doesn't matter if your print doesn't come out perfect, being exactly 1.5mm wide (tall) isn't important, it's just to be a reasonably controlled distance for the SuperPINDA to be from the nozzle, and more than a ziptie / credit card / etc.