Replace joystick with 3 levers or accessory.

[dangerdoc]

Normally, with a quick-attach loader where the valve is on the loader frame
(like a lot of Kubotas), the FEL valve comes off with the FEL, and the hoses
use quick-disconnects. An additional 1-spool valve attached to the
loader cross bar would also come off with the loader, but you may have just
as many QDs, depending on the valve. If your 3PH gets hyd power
downstream of the FEL valve, then the new 1-spool valve would also have
to have power beyond. You can get the 1-spool Prince valves from Surplus
Cntr or Northern Hyd for about $80 for the valve and $15 for the PB sleeve.

My B21 does not have a QA FEL, so that does not apply. With my other
tractors with QA FEL, I never take the FELs off.

I looked at my setup and you are correct. I have another unused hydrolic plug next to the output to the output for the FEL. It looks like I can use a single valve without having to use the power beyond.

My next consideration is whether to use the skidloader adapter or just use a pin on 4n1. I would lose some options for future atachments but I would save the cost of the adapter and the extra weight. Unfortunately, the loader for a M5400 is only 2400 lbs. I'm starting to get concerned that the extra weight of the 4n1 plus the weight of the adapter is going to seriously limit what I can pick up.