can't figure out github so here's the binary with my changes
. auto calibrate scale from homing dot
. measure slack in system
. uses arbitrary fiducials if you supply an image of what you are looking for
still requires more testing, but reasonably functional so far. let me know if it crashes - i've not added all the requisite error checking. see my other posts for details
https://www.dropbox.com/sh/ic2jtr1qi3is ... 4UJla?dl=0