Had a good chat with the seller when I picked this one up.
He wanted a DB, went to see Chas, got measured up etc, but at 16 stone, Chas advised him that the delicate DB frame would not stand up to his heft.
So this was build to a DB design but not from Max/753, and with a one piece wishbone to take his size.
Lovely work, I have to say, and actually I think the very thin max tubes can attract dings etc, so no bad thing this is that bit more robust.
Ultimately this has stood up well.
I guess it's Nivacrom