As per Rans, removed 1/8" from bottom trailing skin on H Stab using shears. Tried 1/16" first with the trim piece curling down. This left some dimples in the side. Elected to take another 1/16" off, however this time used a different offset shears and it curled up. Easier to cut and did a better job. Filed and Sanded to the line. Finish top skins next. Operated the elevator successfully without any rubbing and good clearance.