The PIK20's in my club (2 B's) both have internal fabric seals (looks like shower curtain material), no mylars. We see them a lot since the mass balance weights are checked on every annual...

I was thinking the same thing... need to take off 5-6 year old fabric tape from the ailerons, but if the seals need to come off for the aileron inspection i figured there is no point in mylar, so i was going to either just double-check the internal seals, or do that and put a fresh fabric tape on.

I don't see any tape on the flaps though...is that normal?