True dat. Though rather than cut the bar, I've sandwiched a 20mm o-ring between the grip and the bar end, it fill the space, stops the throttle tube from excess lateral play and doesn't look out-of-place either.
Do you have a close up photo of the o-ring you are talking about. I am just wondering where that samll gap is....I just order the grips and I like to be prepare before I install them. I ordered the Lux with bar-end.