Has anyone on this site ever made their own tank? I've been a welder for 20+ years, and have been certified in New York State for high-pressure pipe welding. The actual fabrication of the tank would not be a biggie, but the design of the agitator and how to drive it is something I know nothing about. I am not sure what bearings I would need to use for the agitator shaft or what the paddles typically look like. I've Googled for plans or ideas on the net for building a tank, but fail to turn up anything. I also do not know what kind of gear reduction sprockets and other hardware for the motor drive are used to turn the agitator. Basically, I don't have any plans or a model to copy from and I don't know how to design it. I would like to know what size outlets I would need on the tank. How many outlets? How the manhole on top is typically built... and if it needs to close down watertight?... does the door lock down? Or just lay closed? So many questions... no answers!