The easiest way to get the additional sets of rear remotes is to add a diverters. With the diverters you can have (in your case) 3 sets of controls all with one control lever.


Simply add a control grip (probably to your #2 control lever) to one of your control levers and you then have the capability of controlling 3 separate functions and never move your hand from the control lever.
I now have poppet-type diverters, so no more drifting

with the internal leakage that Kubota is known to have with their rear remotes. It sounds like you need a triple diverter to gain your 2 additional sets of couplers. I only have a picture of the 4 diverter set. So you would need a triple diverter set with the control grip as seen in the separate pictured control grip for your application.
Contact me if you are interested.