If you would like to build a nice Hydro here is a set of plans I used for my first:

http://www.microhydros.com/doug_forrester/doug.htm

Also here are some pics of the build;

http://www.rcuniverse.com/forum/New_...1045970/tm.htm

I have to warn you...This is very addictive....LOL

Hope This Helps,
George