manual tool change with tool length probe

Is there a write-up anywhere on how to configure LinuxCNC to do a tool length probe when doing a manual tool change?  Having to split my g-code into two parts, for the sake of different tools, is (at least sometimes) a nuisance.

I confess I've been mill-shopping, and although I'm not looking at the shapeoko products, I did end up on a video demonstrating their "BitSetter" accessory, which seems very nice.  I'd love to have something like this.  

I did a M6 remap that does that.  I originally did it as a .NGC remap but then did the remap in Python.  Either way the idea is the same.  See the attached document for my write-up and support files.  If you want the Python files that I modified, I can post them.



 

Is there a write-up in addition to the ngc files?

I had to save it as a PDF to be able to upload it.

 

Thanks! There's a fair amount there to absorb, but I think it will be worth it.