rmur wrote:maybe there are spacers available with the cable attachment??
there are - see tom's setup. They are a dime a dozen at your local shop.
rmur wrote:For Greg, is there anything special about the FSA CX headset vs. other brands -- for this application??
it is integrated, so you can probably get lower this was since the top cap with hanger is the same height as the stock FSA carbon top cap that came on the p3c.
That said, there is a ~2-3mm top cap that FSA makes for that headset, that if you could find a skinny spacer/hanger, you might end up slightly lower.
Cyclocrossworld.com has this deep drop hanger:

but it looks to be 10-12mm thick.
hth
g