I have owned 3 dedicated ss frames so far, Fisher Rig (EBB), vassago jabberwocky and on one scandal (track ends, the latter is still in service and my 2nd favorite), but the frame that’s been working best as a ss, and also in general is the paradox, which is not a dedicated frame. nevermind the added weight, short and stiff chainstays give a consistent advantage when standing, sprinting, climbing etc.