I have been looking at an upgrade in trap guns. My current XT trap shoots about 65/35 and I feel I need a higher shooting gun. I have a long neck and have to work to keep my head down on the stock. I am looking at the XT trap unsingle and the BT 99 AR. I have read about and seen the unsingles adjustments up to 90/10. I can't find any info on the range of adjustment on the BT 99 AR. Anybody have any info?