airbag suspension
Damn you Lost - that was going to be my suggestion! Not only is it expensive and complex, but it's another mod to go on the never-ending list - it's a tick in every box.
I will admit to experiencing this myself - we don't have a roller door, so it's just the carport roof. But after fitting the airbags I drove in with some pressure still in them, and put the ratchet-strap handle through the ceiling. Smart.
Good luck Swanny - seems we've all done somethign similar at some stage!
Thanks!
Matto