30+odd years ago as a lad, an avid modeller, I was given a grp cabin cruiser hull which had previously had nitro in it, it is near 40 inches long. I intended to electric r/c it and started collecting bits together but at the time it was relatively very expensive! and floundered. I now have my own kids and am working on this hull having got together more parts. I am not using the even older Taycol motor, new with instructions figuring it is too nice to use in this boat! I have an 850 motor to run on 6-12V, a 12v 7.2a/h lead acid battery which weighs a bit but it is a large boat so should be fine. The old taycol motor was of course heavy! I have a nice esc for the control of speed and this will power the r/c through the bec system. The shaft is a new water sealed one I intend to fit and a brass rudder. Being very new are there any essential tips I should know, siting/fitting the rudder servo etc? battery siting? propeller shaft siting and angle, Prop size?? going to start with a 50mm racing prop and see what happens! I am not after a racing boat, being into real boats too one that handles/maneovers well would be nice. I figure the 850 motor will offer a good turn of speed and get her on the plane if wound up but throttled back will plod nicely and offer a good service life with the largish battery.