I didn't say I was being logical OR reasonable about it, but I can take a stab at it.
Specifically with Crescendo...that backglass is known to flake badly in a lot of cases, and mine is really quite excellent overall, short of one place I had to tape near the credit reel. Also, there's like NO demand for Crescendo parts at all other than the drop targets, so I know that thing is never going to get re-run. Temperature shock worries me...my wife can't go anywhere without the A/C running full blast, though I guess weather will be cooler by then....so not so hard on it.. Hm....
Farfalla...it's the whole plastic molded insert. I haven't had the balls to even try to futz with that thing. But again...unonbtainum if it gets jacked up.