i'd be interested to hear how your jetting is effected. i had chance to do a plug chop this weekend and the plugs looked perfect with no change to the jetting. i can't see any obvious signs that it's been tinkered with but haven't had the carbs off yet.
it does feel a bit lean up the top end of the counter. feels like it should be making more power but maybe that's what an mc28 does feel like !?!?!?

Dave.