Risk management decision...AKA...gambling
Some have done that with no ill effects...others...not so lucky
The gear teeth face (the part that mates to the complimentary gear face) must
wear in properly.
If not, then they will NEVER be right and most will *WHINE* and that *WHINE* gets
louder and louder as the speed goes up
Why OEMs have a magnet in there somewhere (well most 'good' OEMs do).
That is to catch and hold the metal filings from wearing in...tiny,
tiny dust like particle sizes
It is NOT a hard 500 or 1000 miles and that is the OEMs recommendation
(which is a warranty position...if you don't follow their 'recommendation'
then they can deny warranty if it should come up)
It is up to you...maybe someone on this forum close might help you out for a
steak dinner in trade... :)