When I built my PT-40 I used the jigs and built the washout into the wing. Regardless of how effective it is, it does look cool with the washout in there and is not that hard to do. I tack glued the jigs to the wing tips and held the jigs down to the table with sandbags just like it shows in the manual. Once you have your sheeting in place you just carefully break the jigs off of the wingtips. It works good.

Did you build the A wing or the B wing?