Touch probe and large bits

[Craig]

I had the same problem, you just have to use a 1/4" bit for x & y, then do Z with your large bit:

VCarve V Bit X, Y, Z Probing

Keep in mind you are trying to X, Y zero the center of the router collet. So once again with the over sized cutters (large V bits, surface bits, etc.) it is best to use a 1/4" shank V bit upside down in the collet to zero X Y.