Hi, We're still on the hunt for the 'One'. Going to look at another soon and armed with all the helpful posts I now know a lot more about what to look for. Mindful of the need to have a good rummage downstairs I asked the seller (very friendly and helpful) to sent me a couple of shots of the chassis of his 71/72 model (which he describes as being in very good order) - these are attached. Is there anything that strikes as something at which I should look at particularly closely? Thank you again for your help and encouragement.