Opening top to work on motor

[trimer]

Because those windows dont fold evenly, the chop helps it fold perfectly in the middle. Watch your window next time you open the top, it gets a little contorted out of shape. The "chop" will help the life of it!

[Frodo]

Yeah, without the chop you can get some folds that come to a sharp point and really stress the vinyl. Not as big a deal in this weather, but if it's at all cool you can really put some permanent creases (ie potential failure points) in the material.

[shadrach74]

My window often closes with a perfect split right in the middle. if it does not, I can manipulate into doing so from the inside without getting out of the car. The "chop" is rarely needed...

[mrjr1000]

No way to put top in "service position" without stopping when putting up or down.

The chop is pretty important for plastic window survival. Just replaced top on my 2000 S. So nice to have clear view and no funky crease line. Just avoid the possibility of scratching when you chop or chopping when plastic is dirty or dusty.