Do not get one with the plastic funnel. Just a "Plain Jane" ring. You do need to remove the old ring. When you set the toilet, use your body weight to compress the toilet into the ring. The flange bolts are not intended to pull the toilet into the wax until the toilet skirt contacts the floor all the way around. Then tighten the nuts, but don't use excessive force. All the flange bolt are supposed to do it hold the toilet down firmly and keep it from shifting.