Strangely enough, I had just started cycling the press though with the flywheel, and the throw-off lever just started jiggling on its own - as if it were saying "pull me now!", and so I obeyed. The lever moved just as it should have been all along, and the throw-off mechanism started working. Well, I'll be damned, but it just fixed itself. A person with some sense would probably try to figure out how/why it ever got stuck to begin with - but, I'm just grateful it worked itself out. My theory is that maybe during moving the parts were knocked out of alignment and running the press through a few times might have put things back the way they should have been.
As for those who asked about the stack cutter - it is a QCM stack cutter that I bought on EBay (thank you to Megan for the recommendation). It is so much better to cut with - I was killing myself using my rotary and guillotine cutters - and they were not strong enough to cut Lettra over and over. The QCM has been great so far and has cut nice straight lines (can't say the same for my other tools!).
If I may, have a couple of questions... You make it look so easy to match the ink color with the color of the envelopes! is it difficult with mixing the ink colors? I remember reading in a previous post that you only have red, blue, yellow, black and white. is that the same now and you just mix with those colors? Are you still cleaning your press just using crisco oil? How long would you say it takes you to clean the press? Is there a waiting period between cleaning and using the press again (like if you had to do the second color)?