I need some advice. Im currently running a 82lb MG with my 07 Classic and would love to upgrade to a 109lb thrust. Ive heard that we can use our cranking battery instead of purchasing another battery to turn the 36v 109lb. Is this true? I hope so because im not even sure if the Classic has room for an additional battery. Im sure some of you guys are wondering why i need a 109lb thrust on a 19 foot boat. One word, POTOMAC! Thanks, Mike