Thanks for that. I was not aware of the different sizes.

I suspect I most likely have the JIS 30.0 cup, not the Euro 30.2. Obviously the extra .2 should help with a tigher fit. If not then I will have to get a sleeve or use loctite! Off to the bike shop tomorrow then.

Are 30.2 headset kits readily available? When I look for headsets, the only size I see is the steerer size, and not tube size.. Which one is the most common?