Michael, Thanks for that schematic. I have just taken my electronics box off the side of the spindle head. I am using a KBMM 125 and eliminating the directional switch. In doing so, can I still reuse the tach? The tach seems to get L1 and L2 from the same point on the drive but I wouldnt think it was necessary, just sharing. I would think L1 & L2 from the source would be just as good.

Do you understand what wires 5,11,12 & 14 are for?

My limited understanding says that 5 & 14 are the power for the tach.

If you put your Estop between 24 and A1, are you using a relay or bringing a leg of 120v thru the switch?