I have a 75" Whirlwind three bladed ground adjustable pitch prop on my plane. In checking the tracking, two blades are within 1/16" of each other but number 3 is a little over 3/16" in from the others. I have tried taking it apart and re-assembling it multiple times, moving the blades to different slots in the hub, setting the pitch and pulling forward on all the blades as I carefully tightened down the bolts; all to no avail. Number 3 continues to be out. I have sent a couple emails to Whirlwind with no response (maybe recovering from OSH?) but would like to get some idea if there is something I'm not doing. Any words of wisdom for getting the blades to all track? I've seen specs for tracking that call for plus or minus 1/16" and others that say 1/8". Again looking for some wisdom.

Thanks

Gary