I use Ultracote for covering and use the clear ultracote for the gaps. Cut strips about 1 inch wide - fold in "V" - flex surface to max deflection without servos hooked up - iron on at low temp using trim iron - then trim off excess above the bottom of surfaces - then increase temp to 350 degrees and seal. Work great - invisible - light - takes about 30 minutes for average 40 size plane. I due this to all surfaces.

Ted B.