crank sensors

[TEB0958 at ZEUS.TAMU.EDU]

  i think that drilling into the Harm. Bal. would be a mistake. I am not
  sure, but  i think this could  damage the balancing of the H. B.? ?
  
  Perhaps, a better way of getting the timing down would be to use a
  seperate plate bolted to the balancer's bolt containing the magnets to be
  picked up with externally mounted sensor just like you speak of.
  
  i have seen similiar systems in Summit and H.R. mag.
  
  
  another question: 
  
  have we decided on just how many sensors will be needed for input to the 
  system controller?
  
  -tom