Belts On G4003g

I recently took delivery of a new G4003g. I got it wired up, leveled and did the entire break in procedure. This is day three of using the machine and loving it more and more each time. I'm not getting any of the surface finish problems I've read about. But I do have one concern.

I noticed a fair amount of rubber dust from the belts under the head stock cover. I adjusted the belt tension as it was on the loose side. Got the tension to just under 1/4" slack. Wiped all the rubber dust off...

Belts On G4003g