Why take it off?
I thought about removing it but too scared. I usually wax the rear window. Does the job of keeping water off it. Nice and clean.
May as well remove the wiper then
What is that exhaust back box on your car ?
what size grommet fits into the hole? Or how big is the hole?
Just done mine and used a 25mm grommett i bought from Halfrauds for £1.69 and it fitted perfect.