So I have found a little time after stuffing my face with xmas turkey and many other things to do some work!
Took the plunge and cut off the old rear end replaced it with my pre formed new one. Fitted great thank god.

Made up new down tube supports and welded the cross member back in (with holes in) and cleaned it all up, looks quite good if I do say so myself! Here is the result with the tank in place.

Got a new sprocket in the post which was great apart from being the wrong one. Looked nice in gold anodise though so I am looking forward to it's replacement.
Next job is to make the mounts for the seat unit, get on with it as long as the weather stays dry. Which is not very often here!

New arrival!

So my new custom built seat unit arrived today. Looks very good quality, the seat colour is a little different to what I thought, but it's okay.

It looks a little big on the bike.... the angle of the rear pod is a bit steep but I think it looks worse because the frame kicks up at the back end. My next job is to cut the frame rails off where it kicks up and make a new section to weld on to support the unit. You can see from the next picture how much it rises, so when it's done it should look better, I hope!!!

I made a template for the new rails so it's off to see a friend to get some tube bent up. Also ordered my new sprocket with a 5mm offset, in gold anodised aluminum.That should look cool on the bike against the black wheels.