Are you on a sit down or stand up Longarm? I have a Babylock Tiara II and didn't realize when I first started, that not all rulers are conducive to quilting on a sitdown machine. I have all the HandiQuilter rulers . . .and the ones I really can't use, are the very narrow ones, because the ruler im using also has to be used to move the quilt. The nesting half circles, is one such example. But if you're on a standup longarm, then disregard all that, LOL