I actually meant to post this a long time ago because I built these sort of a while ago.

Advice for anyone who actually builds their own deep-v style rim: Chewing Gum.

I struggled for a good amount of time figuring how the hell to get the nipple onto the spoke without dropping it into the rim. The best method I could find was take a tiny bit of gum, and stick it to the the end of the screw driver, and just sort of fish it in there. I haven't read this anywhere and assume everyone has their own techniques, but this worked quite well. Hopefully someone could find it useful.

And a plus, your rims will smell minty for months to come.