Guy called me back this morning. It's done..
The verdict is kinda what he told me yesterday.
He replaced the stock and lost the recoil reducer. He said he ran 20 rounds, (2 magazines worth) of 3 dram, 1 1/8 oz, which he says is minimum load, and it ran.. Kept the +5 mag extension..
I'm a little concerned at that, but if it gives me a problem after this, I think he'll replace it with something else.
I've got another lawnmower repair bill coming at me at the first of the month, but as I can, I'm gonna run a couple of hundred rounds of the lightest practical through it and see if it's reliable.
He mentioned that they don't make the 2000 anymore, because it's a crappy gun, (paraphrasing, of course)..