Fit the canopy into position by trimming the front and the rear. This canopy is from "Todd's Canopies" and is slightly thicker than the standard Van's canopy and was a joy to work with. Very little trimming was needed (none on the sides, only the front and rear areas). Once the canopy was fitted and drilled / cleco'd into place, the "big cut" was made separating the canopy from the windscreen.... nervous!