You may not need to unbolt your mill and send it to Jersey. (Not knocking having someone knowledgeable go through it, it just may not be required this time.
A picture or two posted here would let us figure out the issue. Most mills are pretty bonehead simple.
From what you’re describing about the rolls not closing, I’m betting you have a newer Durston which has the black plastic cover over the two thickness gears on the top of the machine. It also has a little circlip to keep you from pulling the center thickness gear out. (Which is a great thing, 99% of the time. Except for you. Today.)
What it sounds like is that the rolls have been opened up so far that the two big outboard thickness gears lost touch with the smaller one in the middle. So now you can’t crank them back down, since they’re not touching.
The easy answer is to unscrew the black cover, and very carefully wheel the two big outboard gears down a bit until they’re touching the center gear, and you can crank them back down farther by way of the center gear.
The problem with this is that once you do that, your rolls won’t be parallel with each other. So you’ll have to go through all the bother of re-leveling them so they roll straight. This is not difficult, just annoyingly tedious.
I actually wrote up a web-page showing how to do it, once upon a time. You can find it here:
…well, I just went to look up the URL and discovered my website is down. I’ll reply back with the address once the techies get it back up. The site is www.alberic.net and then go look under ‘tools’ once it comes back up.
Anyway, re-leveling the rollers isn’t a big deal, and the machine I did it on is a late model Durston, so it’s got all the extra widgets on it that you have to unfasten.
Hope this helps.