I took a class with John Flynn a year or two ago. This subject came up. He said that he has had students in class use the Regulator, but found after just a short while, it was much easier to go without it.
My suggestion would be go to WalMart (or right now, to Hancocks), and buy several yards of a cheap material with some large print. Make a quilt sandwhich, and just FMQ along the print. Once you have that down, get some solid color material and do a little FMQ free hand without marking it before.
I know the first few times that I FMQd, the stitches were so tiny or so huge, it was embarassing.
But, with practice, I am beginning to get the hang of it, and I am sure you will too. Good luck.