I have an M7500DT with a FEL. I am not 100% sure if the FEL itself if OE, but the valves appear to be. I have a couple goals here, one is to find the correct control handles if they are not unreasonably expensive, and two is to add a 3rd valve to the stack if possible. Also, it would be beneficial if I can figure out what diameter/unit of measurement the fittings are, and what type of connection (I am guessing NTP or the 37* flare fittings I have seen mentioned a lot for hydraulics. I was figuring if I can add a 3rd valve I could plumb it to the end of the FEL for something like a grapple and to the rear to raise/lover implements like a plow/swather/etc. Thank you for your help!