Oh, well done on fitting the Oxford heated grips!
I literally couldn't get my first grip into position on the RE's handlebars - it stuck solid about an inch short of the correct position. It wouldn't come back off either (no, I didn't apply any glue inside it either), so in the end I had to dremel it down to the handlebar to get it back off. It felt like the inner diameter of the grip was fractionally too small for the RE's bars. Maybe I just bought a set with one grip badly made. Didn't bother with the throttle grip side after that experience.
Anyway, have since got a pair of Keis G601 heated gloves for Christmas, so I no longer view the grips as essential.