A OSBB is 61mm wide. Any adapter that Wheels Mfg does needs two 3.5mm spacers to bring it up to the 68mm BB30/PF30. I'm not 100% certain their bottom brackets have that ability like their adapters.
You could always shoot them an email asking what exactly you'd need as their pages on the OSBB aren't working http://wheelsmfg.com/products/bottom-br ... ckets.html
This advice is incorrect.
Specialized in an effort to confuse have TWO OSBB types. The alloy version that OP has is conventional 68 x 42 BB30.
see here http://www.specialized.com/media/whatsnew/CG0307_RevA.pdf
Personally I like the look of the Wheels adapter since it threads together.
There's sometimes a buggy.
How many drivers does a buggy have?
So let's just say I'm drivin' this buggy...
and if you fix your attitude you can ride along with me.http://www.youtube.com/watch?v=GekiIMh4ZkM