700w is about as low as you could go,1000w would be better.I have a 1000 and still find it will trip out with power supplies etc, It's the spikes you have to think of
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Dave
www.norfolkbuggyclub.moonfruit.com
kyosho optima,Bosscat,Boomerang,,RB5 Vega,RB7,,RC12 5.2, TLR22-4,MP9,HB807T
Flask of tea & a rollup
Anglia model centre & CT Models
http://www.oople.com/forums/showthread.php?t=28117