Oh, I forgot to mention that I am using mavic cxp22 rims, which have a lower profile than the deep v. If you are using the stock fork, you will need at least a 6 inch shackle. FWIW, I use a nashbar carbon fork on mine for most of the year, and that brings the front wheel much closer to the downtube.
Maybe a LBS would let you try a few different locks to see if they would fit?