I had a single red dot for a while on my older Horton, think it was a BSA, not sure. It worked pretty good, the problem I had was I was a pro a not turning it off and the getting into the stand on the next hunt and being up the creek. If you get a three dot you may get lucky and find one that is right on for your speeds and the 20, 30 and 40 all hit where you want. But you may have to play with arrow weights (if you have the room to on your set up)to get your speed right for the pre set marks. They are not independently adjustable, just a FYI. Let us know what you get and how it works.