Hi Steve, I completely understand your doubts, but I have already bought the balls from hahsltd.co.uk. I modified other spheres by welding the valve. after 2-3 years they all end up the same way, the membrane breaks. I'm not sure that my modification is 100% functional, but I think we should invent something otherwise in a few years we will all be left with unusable cars. I've seen all the solutions, the one by Mike Satur with spring shock absorbers, functional but the car is no longer original. Suplexes break the frame and make a lot of noise. The FTuned modification from Malaysia was abandoned due to frame failure. I really like the MGF car and I don't want to scrap it.