Jake, I wish I could help. However I will make a comment or two.
I'm doing mine off the 52panel and my rubber gasket fits in the "slot" all the way around. However I got really frustrated at trying to get the rivets set which hold the vertical strip that the wing vent closes on. I ended up gluing mine and throwing those crapy rivets away. I beat and beat with the little tool you get with them and never got one single rivet to flatten correctly.
In place of the rivet that the wing vent pivots on I had a local machinist make me two sets of "bolts" that look just exactly like the rivets but had a little nut on the bottom. ($10)
Yours is probably nothing like this..... so all this is just for information...use it if you can or maybe it will help someone else.
