My first profile hub was a diamond....only ever skiped 2 3 times....had that for about 2/3 years now my mate has it.....no problems got a new one not so long ago.......hated it at first skiped lots kept going quiet then loud.....took it appart cleaned it out used finishline lube... not a problem ever since......with one crank turn my hub spins for a good 5 mins easily yours needs a good few miles for it to run in ma friend be patient