Interesting post! Always good to put up measurements when 'mix and matching'. Shows the feasibility of changing things for us! I had the same problem with 'immovable outer races' on the Blandit a while ago. Tried for a few days with drifts, screwdrivers ect. Finally gave up and bought the proper tool for around £18. 10 mins, job done. A good dodge, if you were replacing head races was, grind two (or three) notches into the bearing seat in the steering head before fitting the outer race. Gives something to locate the drift on when removing the cup!