Thanks for the replies. Sorry, I've been busy at work and doing my taxes (first year I had to file an extension due to the complicatedness of it) and such. I actually didn't think anyone replied until I reloaded the discussion on my computer.
I'll investigate further, but from what I've found so far is that only one end of the stabilizer is threaded. Also, there appears to be only one hole to insert the pin (why have a pin at all then?).
The stabilizers will not move any further than what is in the photo. It's almost as if to provide just micro adjustments.
I've also decided to just use my Delmorino funny top flail mower on my MF 2860M, and I'm in contact with a dealer to purchase a Delmorino Centurian Super Series flail mower which is cat 2 for use on the MF 4710.