Yeah, that's too much thickness in the middle, which isn't letting the outer ring seal as well. Look in the link I posted in #2 reply above. There is a pic that shows where each gasket goes. The fiber gasket that comes in the kit is supposed to go between the head of the bolt and the ring on the tube of the body of the adapter. I always toss that fiber gasket and use a big copper flat washer. I will try to find a part number for the copper washers and post them here. The ones I use are wider than the ones that come in the replacement bolt/gasket kit. They may not be any more benefit than the ones in the kit, but they make me feel better about the installation.....lol.