Your only concern would be if you dont drive the car year around. Ethanol will hold water and when it holds enough it will break apart from the gas mixture and separate. If you go through a tank or so a month you will be totally fine.
I do not drive my sports car all year round so the last fill...
Most times this happens because the window is dirty. Since its a new window it could have some adhesive from a protective film used in shipping. Use some alcohol on the whole windshield with a microfiber, then use a good glass cleaner. Ill bet it stops making noise after that.
Are you guys in CT? I just ordered the ECU kit from you a few days ago. I’m on LI but could probably get it up to you if that’s an option.
Was planning on going with the flex fuel kit and e50 with a catted downpipe if any of that matters.
Edit: looks like the drive is only an hour and half or so.