I shoot a loop on my bowtech pro 38 and love it. This is a bow with a long ATA and I still think it improved my accuracy. As far as using a vane in the corner of your mouth as an anchor point try using the knuckle of your index finger instead. This is the way I have always shot and it feels comfortable and always makes my shots consistant. It may take a little gatting used to but after a while it will be second nature.