Well, its getting better. Still not perfect. Seems like the plastisol ink doesn't press in all the way, but if you re-press them afterwards (with teflon in between, of course) part of the ink transfers to the teflon and it loses some opacity (thought it does stick in better at least). Also, The ink on the side where I first start removing the carrier (right side in my case) doesn't transfer fully either, so that part of it leaves some ink on the carrier and isn't fully opaque.
Tried using a rolling pin... I didn't have any good way to keep the shirt from flailing wildly all over the place, but it still seemed to do an okay job in spite of that. I think I'll stick with a cloth or somehting for now.
And one other note, when I pull off the carrier paper it kind of jerks a bit whenever it gets to an ink portion, and this leaves some of the edges of letters, for examples, a little jagged. This one probably isn't a huge deal, but smoother would be better.