Chuck-some of this stuff has been discussed in other threads, Regardless of what other experts say I use a dual faucet Leedal and its worked 100% for about 20 years now. It might cost alot but after 20 years you think I got my money back yet? I have never had any neccessity for an inline water valve. Let your plumber tell you. Lastly-anyone can make great sink out of marine plywood and marine paint. Caulk the sides and buy the $30/gallon stuff from interlux or one of the other top marine paint mfg'rs. Take that money and buy paper because now you'l be using alot of it. Most of all have a great time regardless how you put it together-that's what counts most!