I've got a GT Palomar Mt. bike in my stable and I'm trying to remove the freewheel/cassette. At this point I'm not sure what I have on it! I've watched all the vids on youtube, but this one just isn't adding up. I've got the Park 12 spline hub tool along with the whip. The best I can tell when removing a freewheel you don't need the whip, but do with a cassette. I've put PLENTY of torque on the hub tool to where it should have budged. The only thing I'm not sure of is the black locking ring on the very outer end that has 8 or 10 notches in it. Does this have to be removed? I tried taping it with a hammer and punch and it didn't budge. Any help would be appreciated.