Thanks Guys .... what about ESCs ? The biggest one i have hanging around is a 120 amp Turnigy . I would think i need bigger ...... And do i understand correctly that i'm to run two 5S batteries to make up 10S ? .... And i assume the bigger the better when it comes to Mah ? Do you know of any video footage  of a boat running with this ? I'd love to see and hear it go !