I need to change the sifter shaft seal on a TH350. Any good methods to removing the old seal?. I googled and found a guy that uses a small flat screw driver with a hook files in the edge but couldn't get that to work. Tried a bent pick but that didn't work. Wanted to drill a small hole in the seal, screw in a wood screw and pull it out but can't get a drill in there. Any tips on how to get this thing out?. Thanks