With somthing like that it's too difficult to bother with because its so small. It would be much easier just to use an external clock source like haxtormoogle. I had thought about using one of these https://www.sparkfun.com/products/9089 but there is such a small rage of usable frequencies for the Block Erupter that are avalible in the standard package that I didn't bother and am just using standard oscillators.