Another option which I have done to my 2166 is use the reel rotation drive hydraulic line (which I think is the same as on 16xx) to move the for aft. Just need to mount a couple of hydraulic fittings near the others on the feeder house. When i want to move the reel in or out, I just reconnect the hydraulics in a way that moves the for aft cylinders in the direction I want, then engage the feeder, then slowly turn the reel speed knob until the reel moves to where I want it. Then switch the hydraulics back and off I go. Can be done in the field without tools in about 3 minutes.
Cost was about $100 or so for the fittings and a 3' length of hyd hose that I keep in the cab.
I can take some pics if interested.