I've been working on and off for a while on a hardware gizmo for protecting ANY probe from getting crunched. It's currently bread-boarded and under test/development. Once OK - I'll go ahead and vero one but if there's sufficient interest I may have a batch of pro boards made up once it's completely tested.
Basically it's hardware that's added into the control box and then any move that is going to crunch the probe if not stopped will throw a limit (or e-stop).
It'll protect the probe during ANY and ALL types of move, jog, rapid, feed and EVEN (but of course) G31.
I'm aware there are some software attempts at this out there but IMHO they STILL depend on the control software (Mach/LinuxCNC, whatever) not doing anything bizarre. Because this is a hardware solution entirely independent of the control software it *should* be foolproof (that's where the work is at the moment - checking, checking and triple checking).
So - over to you - any interest?
Cheers
Ian