There is an older fellow in Hurst who has a router running MACH3 as the control software and he needs help setting Z height. If you have tie and motivation I’ll put you in touch.
He’s a retired machinist and does not appear to be very tech savvy.
Its been several years since I’ve used Mach3 but there are couple guys on YouTube that may have videos that may help him out.
There’s also a Taig Facebook group that may helpful too: