and you are running 800 lbs pressure ??   LOL.. I hope you are getting a tight bale..

Are you trying to bypass the expense of having bales double compressed ?? 

I get a 125-130 lb bale in timothy with 2 jacks at 800-1000 psi..  depending on specific baling conditions.   I know alot of guys have extended their chambers and went to either 3 or 4 jacks, and just dropped the pressure to 500 lbs, and they still make the same weight bales. I'm not sure what the advantage is between 2-3-4 jack system is..?? (aside from 3-4 hundred lbs pressure difference.  Buyers sure don't see any difference.)

I am curious what is "unstable about the whole feed system" ???  pickup lifts the material- fork arm comes forward grabs into material arm swings material into chamber- arm swings forward grabs material stuffs material into bale chamber.  The feeder is run off an arm directly off the bull gears. There is nothing to 'adjust' really once the throw is set. I've never adjusted the feed arm throw, just moved 1-2 steel teeth depending on the crop to be baled to get a nice tight square bale.  The ONLY time I've had the feed fork arm trip the safety is when I don't slow down enough when 'rebaling' a bale.  I pull off the strings and never 'break the bale apart' to rebale, just pull strings and bale the dang thing up. And, if I go too fast the feed fork safety trip will kick out. That only happens maybe twice a year. 

One _ ELL of a lot more simple and stable than N.H. feed system. N.W. relys on several alumumin (sp) teeth bolted to a rail- which is hooked to a chain- which runs around in a concentric fashion.  There's a long chain that has to be kept fiddle string tight to work correctly/stay in time, bunch of alumumin teeth which can break off, etc. etc.. 

Having run Internationals, Freemans and New Holland baler's over the years,, From my experience Freeman's feeder system is as close to completely bullet proof as mechanically possible.

After looking back at a few balers over the years,, I kind of judge balers by 1 bolt.....

The shear pin on the flywheel....   New Holland, etc.etc.etc..  all have a 'special' 1/4" - 5/16" bolt that has to be purchased from the dealer.   Freeman on the other hand,,,  the flywheel shear pin is just a standard  1/2 inch grade 5 bolt. 

LOL.. I had a relative drive the baler for a few days to help me out... he had a few years of driving a New Holland baler,,,, he babyied the Freeman along as he had been "stump broke" on pushing a N.H. and breaking flywheel shear bolts.  Took me 2 days to convince him "this is NOT a New Holland,, shove the throttle forward to the stop- rev that baler up to speed and make bales you are NOT going to break shear pins."  LOL.. he ran the baler about 3 days,, first 2 days he spent worrying about breaking a shear pin!!