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The aileron stops for the piano hinge aileron option need to be longer than the standard stop shown in the plans. The stops that I received with my piano hinge aileron option were labeled for the PH stop, but they were the standard size and matched the dimensions in the plans for standard stops.
A drawing for the longer piano hinge stop is attached. I have standardized on a 1/8"radius for my finger brake and arbor press brake, so that bend radius s shown. Adjust as needed for your tooling. Note that you need .040 th. 6061-6 aluminum and note grain direction.
Happy Building - Larry Zepp