After owning a glory DH and a few of my friends have glory FR, I would say go for a dual crown. The prob with the FR is it has the same head-tube angle as the Reign-X. If you do go dual crown, make sure the axle to crown height is a little more than a 7 inch single crown....it will be tough but you dont wanna make the headtube any steeper on that bike. Just my thoughts...good luck