Series, Parallel, and Power Beyond?

[RonMar]

Also, Is there a retrofit joystick control that would work with the valve that I posted the picture of?

Prince shows a joystick assembly in the parts manual for the 5200 valve, here is the link to the manual. The joystick parts breakdown is on page 16.

http://www.princehyd.com/LinkClick.aspx?link=products/valves/RD5000Manual.pdf