G.W, i havent really put alot of detail on the model except for crew figures, hollowing out the underwater exhausts and remaking the props on the torpedos. i was going to power it with all 3 shafts but then decided to just use the 2 outer because of drive train problems. i used a pair of those cheap, common motors, are they HP or HB or something. those ones that have flat sides and all the rest is curved. I KNOW its a BIT of a bodge, but they work and if you are careful aligning them they are quiet. i home made the shafts using a 3mm outer with a 2.5mm inner, all stainless steel.the kit props had a fair amount of pitch on them, so i used them because i simply couldnt be bothered looking round for replacements, so i just drilled them out and epoxied them on.....i used 2 rudders powered by a mini servo on its side, for speed control i used an old waterproof speed controller that i stripped down to save weight, and i just used an old 2ch reciever with BEC(all futaba). for batteries i would reccomend that you use 4/6 of the AA cells, and keep a couple for ballast if needed. 6 would only be needed if you wanted to go VERY fast, i use 4 normally, because im a bit of a wimp and i like boats that small to be controllable!!! have you got experience with 'plastic magic'? if so then i recommend this boat because its a bit of a buggaboo at first (or at least my bodge was!!) but it gives me a bit of pleasure when i sail her. does this answer your Q's or help in any way, shape or form?