Abt the battery, issue, I am a bit puzzled, wh would using a lower voltage battery cause damage to teh MF unit? my understanding is using a higher one might cause damage, but I have seen somewhere(don't know where) that they use 12V on teh MF and it still works.

Anyway I use a 2 cell lipo on my pershing and it works fine, a 2 cell lipo on full charge is 8.4V. i have been running on that since last year.