Would the Inventables Z probe work with the Shapeoko 3?
The connectors won’t match up, but insofar as it’s just a chunk of metal of a known thickness w/ some wires, yes.
See: https://www.shapeoko.com/wiki/index.php/Upgrade_Overview#Probe and esp. https://www.shapeoko.com/wiki/index.php/Touch_Plate1
If you need Z probing then these style of probes is actually quite useful and cheap (can find ones for $10 on ebay/aliexpress). For jobs where you need to swap end mills, it gives very good repeatable Z zeroing.