Okay, this is definitely not a subject hijack and this question could probably warrant it's own thread.
Leaving all the aftermarket frames out of the equation, eg - Cheney, Mettise etc.
What original manufacturer frame was the best, pre 65, eg - BSA duplex?
I'm talking Short Circuit ( DT ).
I've put this question to Les Burdus who was one of the " GUN'S " around the time the Hagon's first appeared.