Cut the canopy tracks C-657 to length (measured, measured,measured again and cut), assembled the rollers, drilled the holes through the tracks and clecoed in place. Drilled the hole through the nylon block and bolted in position. I had to bend/form the C-763 slide space just a bit. I bit confusing where to drill the screw holes but worked it out in the end, the rivet holes I had misread so it has a couple more rivets in than the plans state, but won't be a problem, hold it down better.