very nice tool !

Myself I have found that its more important to measure each engine consistently then anything else...I have used all sorts of methods and have found with the light method that the brighter the light you use, the higher the timing numbers you get...I myself prefer a dull light, but I base all my timings off using a dull light....So lets say on a bright light a crank times out at 210 degrees, but on a dull light measures out at 205 degrees.... Which is correct ? I say it really doesn't matter, as all my timing changes are trial and error, I usually push the timing in small increments and dyno test between each change... When I find the sweet spot I mark down how many degrees of change and repeat the same timing change on the next one......I am more concerned with how much change, and less concerned with final numbers..the key is to be consistent when measuring..measure each engine in the exact same manner, using the same light intensity and measuring technique....Different techniques can give you variances in the final measurement....