Electronic Speed Controllers, HELP ?

[Die Judicii]

Are there any members here that work with electronic speed controllers, potentiometers, and joysticks either employment wise or as a hobby ?
Definitely not my cup of tea,, but i need help to know what parts i need to purchase for a modification on my shooting rig.

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[Wapiti]

Dead set mate, you do pretty well with what you already have done... I can't help except make useless suggestions but have to say there's no denying your inventiveness and effectiveness in what you do.