Does anyone know the diameter of the factory 3 spoke boxster steering wheel? I got a new momo wheel that measures 350mm. I don't mind if it's a little bit smaller but if it's a lot smaller I don't know if I want to use it. Also will I have any issues with turning off the airbag light when the day comes I put stock whee back in? I like the look of the prototipo wheel and it wasn't too expensive so I thought I would try it out.