All in all I'm quite happy with what I have found so far.
There is a bit of rust damage but it isn't utterly dreadful. I'm most concerned about the body rust under the front right hand wing - but there' no point sticking your head in the sand about it...
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The front cross member has rusted through on one corner and there's a fair amount of rust on the inside of the tube. It has to be replaced. Whilst I've seen a replacement part for sale I'll probably just go and find a bit of 2 inch tubing and weld the old mounts on that and save some money.
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The front panel has a bit of rust on the lower edges in the corners. I reckon I can repair that quite easily. I'll weld in new metal.
The wings also have a few moth eaten edges that also need new metal.
Long live TIG!