as for cutting the hatch, the directions just show an exaco knife kind of thing. is that going to cut it (pun inteneded?) or should i step up to the dremmel?

OH and i have a paint scheme in mind. It transitions from white to blue at the waterline. so the question is, how to find the water line. I dont have my radio gear but i can canableize one of my rc cars for radio stuffs. add the lead bulb to the top/inside (i was considering just pluggin the hole in the botom (from the keel) with some modleing clay) then floating it in the bathtub to get find the waterline.

i could go through that, or i can gestimate, or can i assume that the pic in the other northwinds post transitions at the water line?