I asked about this in a reply to the "worst toilet" thread..but thought i'd post this as new...I installed the AS Champion with the (apparently new-improved flush valve seal)..but sometimes get that cycle of re-filling because when the flush tower lands..that thin flat rubber seal can be out of proper position (folded)..allowing water to trickle down the drain...Is this the new improved seal?..Is AS aware of their re-design failure?..Is a fix in the works?...seems to me that a tapered, more 3- dimensional type seal would work better..made out of that old natural gummy/gel feeling rubber..you know..that translucent amber/brown stuff..I wish AS would let me take a crack at this thing..I'd fix it forever..cost shouldn't matter in the fix of this seal....how about an eagle bladder filled with whale oil?....Don