I'm In Need Of Some Advise. When Your Pump Has A Shouldered Wear Ring, Is The Impellor Cut For The Shoulder? Could That Same Impellor Be Run With A Ultimate Wear Ring? I Want As Much Punch On The Bottom As I Can Get,and You Guys Here Seem To Swear By Those Ultimate W/rings, So I Thought I'd Try One. I Know This Has Been Covered In Another Thread,but The Shouldered W/ring Part Threws Me Off Alittle.