To the OP...isn't the new Sigma 35mm f/1.4 the one that can be configured via a computer without having to send the lens to Sigma? I thought it had the ability to adjust front / back focusing issues until you get it correct.
At some future point, you can pay $$$ for a tool that will let you adjust focus accuracy of the lens so that it may match what you already paid for. Sigma has promised it, but hasn't delivered it.
About two weeks for $59 with software. Not too shabby.
Congratulations KKC. I know you're going to love that lens.