Hi Andy and welcome aboard. I am in the process of arranging a replacement subframe for No.146 at the moment. As well as the other suggestions for advice, I suggest when you go green, speak to Dominic who deals with replacement subframes on behalf of the club. He is a mine of useful information for those, like myself, who may not be fully up to speed on the technical aspects and options to overcome the problem. He has kindly arranged to have the replacement refurbished subframe enamelled at his end and I am arranging to replace bushes/bolts and fit stronger link arms as well. So I will basically end up with better than new with the confidence that it should never be a problem again.