Hi I see you got your extreme ordered, congrats you will love it. For that set up you will want to get a straight line capper I use the one from traditions. It will seem a little awkward at first because primers seem to want to fall out while your pulling the capper off. To beat that I start a cap in the capper and then as I am pushing it over the nipple I rotate the gun towards the capper side so that the caps inside the capper fall back and then pull it off the nipple. It takes about 10 times to get comfortable with it.