Hey Don,
Haven't tached it yet. My tach's batteries died and I found out it uses 4 watch type batteries that cost $3 a piece. I can get a new tach for about the same price, so I'm "sans" tach right now.
I'm ordering some LiPo's as soon as I figure out how to charge them without buying another charger

. I already have 3 chargers. Aerographix (RCU member name) is bringing a charger from Germany into the US that looks very nice. Until then the NiMh's work just fine.
The Razor is awesome. You'll love this set up if you build it!