The thread in the captured nut which holds the long bolt has stripped and won't hold on to it - I have the replacement (captured nut) part but don't want to weld it in. I'm trying to decide whether to replace the VW bolt with an ordinary HT flanged bolt & nut - which could cause issues at the side of a muddy country lane... Or, fit a Helicoil, which I've never used before, and use the original bolt. I'd be grateful for to hear from anyone who has used them will it stand the test of time...?