RE: RC Surfer
Surfcurls - Brendon did the antenna tube for me. I'm not exactly sure how he's done it, but he has made a tiny hole in the hull (near the batteries for the receiver) and another hole that you can see the antenna tube sits in. I can't see any silicon etc around it to seal it in, but he said it was definately water proof.
The last time I took it out I didn't have a drop of water inside the hatch/hull. Brendon also just cut up some sponge (like you useto wash yourdishes) and placed around certain parts of the board where if any water does get in, it will be soaked up.
wbf1mad - I purchased the Seaking 90a w/bec & watercooling just because I was worried anything smaller might heat up too much with the Feigao9L brushless motor I brought & the Lipo's. I'm hoping it will stay pretty cool under there. TechyJoe has a great setup that he said works well so you may be ok with a smaller ESC as he has mentioned.Will all depend on the other components.