I'm with Smallfly on the KISS principle. I purchased and installed a regulator for my 30% Edge from one of those advertisers in RCM or MAN. Setup was 2700 mah 5cell 6.0V NiMh input into the regulator and for output I got ....ZIPPO, NADA, ZILCH, ZERO volts.
So I sent it back to the mfg and they sent me another unit. It's still in my parts drawer. Why install another component that may fail? (a single point failure here would mean lost airplane, unless you add redundant battery system).
Most of the IMAC guys I talked with do not use a regulator with the 6v packs (They seem to need to regulate the fancy Li-Ions and Li-Poly though due to the much higher voltages).
Just keep it simple.
I still run all my heli's on 4.8 V as I don't have enough info in regards to the gyro and super speed servos and how they'll withstand the higher voltage of 5 cell packs.
Any heli guys out there flying with 6V packs? Regulated for the gyro and/or high speed servo?
Any info would be appreciated.