Hi thanks for your Interest, just been given basic hull which is 36 inches, whatever that scale is. Got a few bits from slec, they gave been very helpful, I want to be able to switch two tone sound + blue lights from radio transmitter, I assume I will need some thing larger than 2 channels? I will also want to fit searchlamps, being a novice any help would be appreciated, being a fire tender I would also like to fit operating fire hoses, am I being daft in thinking car windscreen washer motor could be used, again thank for your interest best regards Paul