I'm having trouble removing a couple of blade bosses from Chonda motors. I have cut the shafts off the motors and tried pressing the shaft stub in my press and there is no sign of them moving. On the second one I tried, with a bolt into the end of the shaft, all that did was push the bolt down into the shaft stub. I guess 12 tons will do that. I tried heat from a butane torch but not sure if it got it hot enough. Any other thoughts as I want a boss to fit on a Honda motor?