Hello- I’ve read a few previous answers regarding can you use the McFly bit with bitsetter. It says yes then they talk about the paper bit. Am I correct with saying the following: I would use bit zero as normal for x,y and o. I would then change my bit to the McFly and again measure zero using the paper method. I would then use bit setter with the McFly in the router.
Simce the McFly works with the bitsetter, then there is no need to zero using paper once you switch to the McFly.
Do your zero normally. If you are zeroing with a different bit, then use the “Load New Tool” button when you want to switch to the McFly.
Basically, you don’t need to treat the McFly differently than you would any other bit.
Now, other surfacing bits may or may not work with the BitSetter, you’d need to check.
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Thank you! Will do. 
A bit more info:
Most surfacing bits have a indentation in the center where there are no cutting surfaces. They will not work with the BitSetter style on the Shapeoko 3/4/4Pro. The McFly has cutters in the center that will trigger those.
If you have an HDM or Shapeoko 5 Pro, the BitSetter is different and wider diameter and will work with any surfacing bit that has than 1" or smaller diameter.
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I removed the bottom cutters on mine cause they don’t do much cutting besides just adding friction & heat. To use with the Bitsetter, I place a larger washer atop the magnet to catch the outer cutters. As long as you do so upon first initialization, it works just as it should. If you remove it in the middle of a series of operations, you’re screwed.
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