Hmm... I think I, too, may just have to live with the front part of the top tending to "flop closed" and make sure I always keep my hand up there to prevent it. Not that big a deal as long as I know what it does and remember to prevent it. In my case, I could see it being the combination of the springs getting weaker over time AND the new top being made of heavier material.

As for the other problem ... a defective latch cylinder, eh? That's interesting. The shop I had my car at started talking about it probably being an issue with a micro-switch that failed, but I really didn't believe them on that. (Makes no sense, as I'm not aware of any switch that would have to activate right at that point that would stop the window glass from latching shut all the way.)

I just did some Googling and found this:

https://www.tophydraulicsinc.com/chr...-cylinder.html

Probably my best bet, if I can figure out how to take the original one out.