Hi Leslie.
To be honest I think maybe there is less peak currents getting through?
As regarding the heat of the motor, I was having so much fun in the woods, I decided to stay there longer 
and I have no doubt that was the cause of the heating.
I think perhaps it's the peak currents that might be limited with the infinion controller. I know you can adjust if you can find a cable to do so, and the software.
The throttle also seems a lot smoother, as if there is some king of soft start, But that could be down to leas peak current.
However this is nothing really and still has masses of torque. I just would love to know the limit of the pie before she fry's!
I'm thinking now that this controller is the way a 40 amp controller is supposed to be. It gives out a max of 42 amps constant. I must reset the peaks on the CA and see what comes up!
I have no doubt this controller could take 70 amps with a mod 
no no no I'm not even thinking about it! That would mess up my shunt value and make my cycle analyst useless, unless I could find a proper shunt rated for 60 or 70 amps!
Anyway I might consider it when I'm hungry some day and I'm in the mood for some baked pie! for now I'm happy as she is!
Just keep in mind your ping limitation.
The irony is that you loved flogging that little 6 fet controller to death and now you gots 12 or more fets you're limited to your pack performance.
What the cont and max. That controller can do 72v ehh.
I think you will find changing resistor R01 and sticking 72V into it will really wake those fets up and the gate clamping will be so much more hair triggered.
See the fet gate legs are clamped to ground via a resistor, or resistor and zener, and so they don't get stuck on. At lower voltages, when switched off, the next trigger has to work harder to bring the fet back on, this slows the switching speed.
This also makes the controller less efficient at the lower voltages when switching is impeded in this manner.
Put the volts up to 72v, and the gate clamps that keep the fets off voltage rises on the gate, closer to the point they are almost switched on..
The plus side is, the MP IMHO will be fully efficient at 60v, wind resistance picks this off but thats to be expected at faster speeds. Some wind fairings or a low rider recumbent would with a nose cone will make the MP at 60v perfect efficient and fast powerfull machine.
Between 72v~60v is a good middle ground for both your controller and MP I would say, 72v will make the controller very responsive but then you loose a little with the MP at the top end of acceleration.
60v the controller will be better than 48v but not as good as 72v, at 60v the MP would be spot on.
I could be wrong. But Im just judging from the way my 72v Ecrazy controller would run at 48v compared to 60v. Much better throttle response at 60v I experienced.
My down fall was is my HBS wasnt going to be very efficient at 72v, and sucked at 60v as it was, Sure the bike went faster but the torque was feeble, so the sweet spot I was looking for was out of my systems grasp. Unless I modded the the fet gate clamps to do hair trigger switching at 48v at the risk of omitting the 60 and 72v operation possibility (voltage on threshold exceeds gate clamp at high volts)... I was never going to get the same performance as my GM controller designed for 48v. Something I couldn't be bothered with.
Many say the higher current only gives better torque, and this is true generally, but there are a million examples where the volts with certain gear gets the rider more torque.
When you gets rich maybe get a 24v 20ah pack and series it to your 48v pack to make your back 72v, and then report how your awesome Infineon controller goes.
