There probably is. I know a few guys in the DFW area. Try the sanctioning body sites, www.impba.net
to locate clubs in the area.
Wow, lots of questions. I'll take a shot at a few of them.
For playing around with, the center mounted rudder is OK but offsetting it 2-1/2" to the right is better for a racer but even for the recreational boater it makes it easier to remove the cable for greasing.
IV bags, all I use. They will collapse as they empty and only need one line to the carb so water can't get in. The bag must have fuel in it at all times otherwise they will harden. They will sometimes weep a tiny bit of fuel the first time that they're used.
Plumbing. One or two lines in from the rudder. One line to the lower fitting on the cooling jacket and the other to the cooling flange on the exhaust. I exit the lines out of the left side of the hull as we drive in clockwise ovals and can see if the system is working properly.
Tighten the nut on the collet and don't be too shy about tightening it down well. Even loose it will spin some.
Cable grease. This is one of those ask 100 people and you may get 100 different replies. I've tried a lot of things over the years from trailer bearing lithium grease on up. Some use a grease and oil mix.