Thrust Block with 489 Sure Grip

If you are running the green bearings you do not need the thrust block. However if you are using custom axles you can grind the end off of each one an equal amount to get the needed clearance to run the green bearings with the thrust plate.
This may only be a 16th or 32nd of an inch grinding on the end of the axle.
This is if you don't want to mess around with pulling the trust button of the Sure Grip.