Frame is raleigh Dynatech delta 525. it is a mixt of metals... main tubes are titanium, lugs are aluminium (main tubes are glued in), front fork and rear triangle is steel.
I was thinking of use part of rear triangles from other bike (if I could find ones with tubes large enough to fit original stays inside and braze it. - so dropout part effectively will be a lug with chain and seat stays brazed inside.
not sure if thats worth it...