[jhautz]

As long as you run a UBEC or external Rx pack you should be fine. You should be using one at 12 cells anyway.

Just monitor the MM temps and adjust the gearing down if it starts getting to hot. Some of the newer MMs will not run the higher cell counts. They just dont start up. If yours doesnt start then you have an newer one. Then there isn't much you can do as far as I know. There may be something to running it without the LVC activated to allow it to run the higher voltages but Im not sure about that. Since you are running NiMH that shouldnt be a problem fpr you to do if it works.