Nice set up, thanks for posting for those of us wondering about water cooled spindles!
You probably know that just using your medium/fine diamond hand hone can fix that in a couple minutes. Or just keep honing the 2 high cutters whenever your touch up sharpness between shafts, until they eventually are all the same. I like light spindle oil for lube. Any light oil works. Olive oil is traditional.
(This assumes that the cutter is low, and the hole and spindle are a snug match. Not that the cutter is merely slightly off-center.)
smt
The 3 wing cutter actually (off the shelf) has one cutter about 3-4 thousand lower than the other 2
You probably know that just using your medium/fine diamond hand hone can fix that in a couple minutes. Or just keep honing the 2 high cutters whenever your touch up sharpness between shafts, until they eventually are all the same. I like light spindle oil for lube. Any light oil works. Olive oil is traditional.

(This assumes that the cutter is low, and the hole and spindle are a snug match. Not that the cutter is merely slightly off-center.)
smt