SST-50 Driver + XM-L2 + 26650??

Anyone thought of using the SST-50 driver to get the sustained 5+ amps from one good cell? If so, how has it worked out?

Which driver are you talking about? Got a link? The SST50/TR-3T6 works well with XM-L and MT-G2, can handle 2 or 3 cells and is resistor modable. Lots of reviews float around on that driver, and here’s one from my X7: