IMHO, if you're going to be running on tracks with long straights, try the FM. If you're on smaller tracks or tracks with lots of short run ups to jumps, stick with the Pre. If you're still undecided, consider your trigger traits. By that I mean, do you have a light or heavy finger? If you have a heavy finger, it might be worth while to try the FM as it has a more smooth pull. If you have a more ( don't shoot me for this choice of words, please :P ) delicate finger more of a finesse it around the track, you would probably be fine with the Pre.