quarter window

Hi all! Does anyone have the Speedform Vintage Quarter Window Louvers from American Muscle installed on their S550? If so, have you run into any issues re: water trapped behind the louvers (i.e., from rain, hand washing the car, automated car wash)? Looking to pull the trigger on getting a...

I've noticed my rear quarter window (both sides) have a little play in the seal, almost enough of a gap I can stick a butter knife in (just for visualization, havn't done it lol). Its as if the seal has lifted up. If I place my finger directly on it and push down, it travels a few millimeters...