Thanks again folks!
Got the yoke turned without breaking the neck off or anything*
and took another picture... looks a little better, but I think that no color info is getting to the tube, the color differences seen are likely differences in drive levels/tracking of the 3 guns. I have made no adjustments other than turn the yoke to its proper position.
Steve D... the "holes" are just little dust bunnies. I remember seeing several of the 21" round tube (cyp?) versions of this set, and they did not have a color logo either.
*did that once to a 21AXP22... had to change my shorts!
jr