Hi Tommygun,
Along time ago in a far away place, the Quarter midget guys tried to use gauges/templates to verify the wing thickness for this class. There were guys that followed the rules and their planes passed the inspection gauge test no problem. However it was the guys who made their planes to the absolute minimum or so they said and if it didn't pass the gauge test, then the guy would scream and complain that the gauge was faulty or inaccurate etc., etc.
So after allot of complaints by the squealers, the gauges were deleted so the CD wouldn't have to spend 45 min listening to someone who's plane didn't pass inspection but, thought ( In sometimes a very loud and vocal manner) our (Insert favorite colorful meta-fore ! ) gauges were the problem and he should be allowed to race. Personally, I would have DQ'd the guys for the pitas that they were and for taking up valuable racing time.
So no, I don't believe the template/gauge idea would work for making sure the planes are scale. Too many variables and complainers. Its supposed to be fun don't you know and not an argument.
Carlos G.