kpj -

I have this on my hot rod (not a Singer...). The first thing you mentioned is a real advantage - when you pull in to a gas station with a handful of other air-cooled 911's with stock gas cap location, it's nice to be able to access the pump from the 'other' side of the car - no waiting! I haven't experienced any of the other issues you listed to a degree that outweigh this one advantage.

-Scott