Sanded axles too much?

[pinecone123]

Hi, I purchased stock bsa axles that were deburred and straightened. They were already sanded with, I beleive 400-600 grit. I started with 1000 and finished with 3000 grit. Now after putting the car together and a few days away from our race, I think I may have over did it. There seems to be more play than usual between the hub and the axle. With a finger spin they spin fine. If I spin very hard or use a drill (to break them in) and they spin fast they vibrate and slow down! It doesn't seem to happen on my test track (plastic 25') strangely. I worried that it'll slow the car down on the real, longer derby track. One other thing is that when I added more graphite it seemed to lessen the vibration. Sorry for the long post, but in a nut shell: Is there a baseline or guage to use to see if I went to far with the sanding and is anything I can do to stop the vibrations? Thanks in advance for all your great information!

[DerbyDoc.com]

I think it should be okay if your times are still good. I just took one of my cars out and spin tested the wheels, and I get the same vibration with a hard spin. Its really hard to tell how good the wheels or axles are by spin testing, but mine usually spin for between 12-20 seconds when lubed.