Fat Chance Team Yo Eddy 1992, Medium size frame, original Big One Inch fork
Damage to top of seat tube (see pics). Current seat post moves up and down fine. Been ridden in this state for two year, and damage has not got any worse. There is no damage to the junction of seat/top tubes and seatstays, or further down the seat tube. Frame alignment looks perfect, and from what I can see there is no internal rust (looking inside bottom bracket and down seat tube). Bottom brackets threads, rear derailleur threads and steerer tube threads all good. I had braze-ons for rear rack and seat clamp braze-on added when I had respray about 6 years ago (by Argos of Bristol, UK, a respected UK frame builder).
From what I understand the seat tube damage is a simple repair, but frame too small for me so I'm offering it up to see what any retrobikers have to swap. I will be keeping the parts, just want to swap the frame and forks. I'm after a mountain bike frame, between 19 and 20 inches centre-to-centre, ideally steel but aluminum also considered.