Triquetra

Perfect X,Y,Z zeroing--every time.

The most important part of all your carves is zeroing. Inventables offers the Z-Probe as an an add-on, which does work great for that Z-axis zero. However, you're still left with basically eye-balling the X and Y. Thankfully, there is a better solution--the Triquetra.

Triquetra is a product developed and sold by Charley Thomas over at C&L Woodcraft.

Recently (Jan 2018) it is now compatible directly in Easel using a macro. It is incredibly easy to use once it is setup and having the ability to get perfect X,Y,Z zeroing between bit changes and/or interruptions is invaluable.

The website is here: https://triquetra-cnc.com/

See a demo of the Triquetra in action here.