Puma failed its MOT for rusty rear brake hole ferrules, 30 minute job I thought.......NO :-( . When trying to get the flexi hose seperated from the brake line, I discovered, behind that rubber carpet, a hand sized hole in the inner wing(s) immediately around the brake hose bracket extending down then along about 30cm at the bottom where it joins the chassis (the chassis is fine). I think the thickness of this is somewhere between 1-1.5mm, is this correct, what are peoples' experiences?