Thanks guys for the links somethings up this end having trouble getting pics posted. The front sprocket which does'nt drive it as the tracks not linking at all looks like a modern truck rim thats been cut to suit. The tracks would have to be off an existing vehicle as to build your own track links etc would be a major undertaking. Apparently they will build to order, price tag is way out there

A most impressive machine but I'll stick with the lumbering history builders. David...