I recently purchased an s12sn with 72v lcd3. Took a look inside the controller and it contains fb4410z mosfets. It also has what it calls EABS braking with inputs for simple trigger or variable trigger (not tested). Perhaps this is what it calls regen, lcd3 parameters can adjust the motor brake strength vs regen. I've installed this on a used gt sts with a front 1500w hub motor (yes I'm crazy, you will need to build your own steel drop out if you go this route, no torque arm(s) will help you, I've tried and failed twice with a weaker 48v controller). The max output wattage of 72v controller will exceed the lcd3 display capabilities (possibly limited by exisiting code and components of both products). You may need to add an external speed sensor to the system (used reed type from existing bicycle computer on ground and signal wire, black and white) or change option in lcd3 to use motor hall. Motor hall speed sense will kick in if it doesn't receive proper input from speed sensor connection, though this does not always reset the timeout feature. Overall this was an excellent purchase as I am able to sustain 72 kph on an incline without assist. Note I am a 130lb lightweight and the bike is thermoplastic that weighs under 25lb prior to install. I may place some photos of my rig some time in the future. Good luck on your build.