crank trigger tach

[427Fastback]

I have put 1/2" keystock in my machined grooves as the 4 slots didn't work.I now have four towers .250 high and the full width of the balancer.Tach still does not work properly...I have told Autometer about it but they have not got back to me...Only thing left to try is a new sensor..
Three different methods to trigger it and none have worked..

[fekbmax]

What type of pickup are you using?

[427Fastback]

The one that came with the tach.......