I did not do any trimming - just finess, encouragement, brute strength and 2 sets of hands. Popsicle sticks can help at pressure points to encourage while reducing scratching engine paint and/or powder coating.
RV-14A Builder - kit #136
N314KC - First flight Mar 8, 2017, Phase I compl Apr 3, 2017, >220 hrs
Sport Pilot (weight-shift control) - Airborne XT912
Dues paid 11/2017