| Message | 
One thing you could do is to get two laser pointers.  Then you could simply measure the distance between dots which would give you a larger difference for a given degree measurement.  Just a thought.  You'd have to work on centering them up but i bet that would make life much easier. 
 
 
   "The 300ZX Turbo is a dance; it's a song; it's rolling, roaring automotive art.  There is no color that doesn't suit it.  There is no mood-lifting chemical substance it can't replace." - Automobile Magazine
  | 
  |