Thanks mate for the pressure testing info, it's a great idea. I got the surfcurls screws with the neoprene washers today so that should help make sure no water gets in through the screws.

How's your new ESC been going, no issues?

I'm taking mine around to Brendon (The guy that originally created them with Jason Hall) on Friday. I only live 5 min from him & he said he's happy to take a look at the small leak & at the short run time i'm getting out of it. 

As the Kyosho RC Dudes need to be put together from scratch and glued/epoxied together (I mean everything!!) it will be good for him to check it out and see if it's done right.

I've also just got my new motor, ESC, water jacket, surfcurls screws, heat shrink & Deans Ultra plugs. Still waiting for the flex drive cable, prop, drive dog & Lipo battery. So hopefully in a week or so i'll have it all together ready to go.