Hi, I purchased a 60L Speidel fermenter a while back and had not used it yet, I cleaned it all up and went to put it back together and I am having trouble keeping the seal in the top while putting it on, when I put the seal on the body it seems to be ok but then the strap does not seem to want to close(to tight) I have no idea what I'm doing wrong, I looked at others and I seem to have band on correctly but something is wrong. Any help would be appreciated, Thanks John