Nice!I just finished a couple with his Ipwm with dual 21700's. There great and if thats not enough I have a 3S one. Its a little scary
I built a dual 20700 iPWM and have a couple of his 1S iSwitch boards looking for a mod. A recently packed in Luxotic will be one of them and was pondering the Pulse BF as the other but it still works fine.
Patiently waiting for his iPWM D board with buttons and OLED screen, it's going to be sweet!