Rich and MFR,
You both bring up some good points and options to consider, now I did stick a couple 540's in in it with reversing esc's and 2 blade props already.
NOW, I did not put this setup in the sport fisher I put it in  52" yacht of my own design to get an Idea of what I'm up against.
This is subject to change on the first shake down, the lakes have been froze around here but starting to break up so hopefully soon I can do it.
I'm going rc on a couple other boats also and I'm looking into the options Rich said and I like the sounds of them also. If I'd seen that post before I bought this stuff, I would have went that direction as i was wanting to keep everything 12 volt.
Well I'm off to see if theres an opening to run this thing, if so I'll post a video.

Buzrow,
 The  scale sports fisher is an Ocean 50 Convertable SS, not quite complete yet but will be soon. It's wood and rather heavy as most scale boats are to keep the water line right. Im at 32lb's right now and can add weight or take out a little if needed.
The yacht I'm testing now is around the same weight.
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