Cain believes it unlikely I have bent or knackered the frame / chassis, more like I have bent a spring because I dared to accelerate without a anti tramp bar! Not that I drop the clutch at high revs etc.. Going to look at it, if I can’t seek and destroy the issue this weekend. If needs be I will swap them over to see if the problem either rights itself or occurs on the opposite side. First though, measuring and bits of string! Then Anti Tramp bars if it does,