Now, good luck on your prelim. I passed my pre-prelim about 2-3 years ago (it's been so long, I can't remember how long now) and have been working on my prelim MIF since then. Pathetic, I know. (Those stupid 3 turns on the line.....) But, then, I'm an adult skater (we take a little longer), and I've had chunks of time when I've had to stop skating for several weeks...Plus, I don't always practice my MIF like I should - and, my coach doesn't like working on them, either.
So, you'll probably be doing them in no time, unlike me.