@drilling-vagueness, there’s now been enough testing on the Auto-square version of the firmware I built that I’m planning to mark it as officially supported and post it up on the flashing docs page for easy download access of the HEX. That being said, most of our docs might not necessarily be updated to show this support for a while now since our team is quite strained in several areas what with earnest work underway on ATC, AutoSpin, new gSender release, grblHAL core firmware re-merge, etc. but luckily the setup is relatively straightforward.
For now you can find the majority of info here: Auto-squaring on the SLB - #18 by chrismakesstuff
And also here: Technical Manual - SuperLongBoard
If you have any questions about it definitely post in that ongoing Forum topic 
otherwise I’m glad to hear you got your existing homing issue sorted 