CLARIFICATION
Just got off the phone with Jason Foxworthy, 600 racing parts director:
Bassett or Trap wheels only, which are the 2 brands 600 sells. No other manufacturer (Aero, Diamond, Marsh, etc...). Wheels do not have to be purchased through 600, and will not have any INEX or 600 stickers or markings...just have to be Bassett or Trap.
This has been a public service announcement from VMS Motorsports...relax everybody!
I would assume this is because of all the lighter wheels out there people are using. this will be a quicker and easier way than to pull peoples wheels off in tech and weight them.