A hot day so did more fitting and measuring for the rear window after buying two more spring clamps to help hold it in place. I made many measurements to try to get things as even as I could and marked where the canopy meets the F-1232B-L & -R rollbar brace brackets and then started removing material after measuring the distances between the aft edge of the F-1231A-FL & -FR Roll Bar Frames. In my case it was about 5/32". This is the part where I messed up a year ago, causing me to order a new window, and it's VERY hard to get that alignment up front AND maintain the 5/16" edge distance on two screw holes immediately behind where you remove material. And I'm not sure I did this time either. If I did, it's VERY close. You're trying to keep the edge of the canopy from hitting the bracket while maintaining that edge distance AND aligning that front section as called for. Van's really should consider a different hole pattern here. Anyway, I got everything lined up and pulled the canopy slightly forward of those brackets for a pretty perfect measurement up front, although eventually I'm going to sand that forward edge after removing material. The canopy wants to slide around, especially when you clamp the sides in place to push up the rear part of the window. I got it mostly OK; not perfect, though, which is what I was going for. It will be hot again tomorrow, so I'll try drilling. Carolie will come over for a few hours in the daytime to hold the wood block as I drill. And old friend Heather (who is not actually old) will stop by in the evening. The sequence of drilling demands care. I've got to doublecheck to make sure I have all the correctly sized drill bits for plastic. #40 #30 #36 #27