I made an appointment to go pick up my custom plates today, and almost as an afterthought took all my SB-100 and registration stuff with me. I thought I would get some errors on the temporary reg corrected in time for Monday. The first clerk I got could not issue the plates (they have to go out with a completed registration, so I'll get them Monday) and referred me to a very busy supervisor on my SB-100 questions.
She took one look at the CHP verification and said, "No way!" The inspector had written 2006 as the year, and she was insistent that this field had to be marked 0000 for a specially-constructed vehicle. I told her (verrrry politely) that the CHP officer had been certain he'd done it right and they could call him if there were any questions.
Well, she not only called him, but called him in. He showed up a half-hour later and even though he has done a dozen inspections a day for years, she re-educated him on several points and he left a few inches shorter than he arrived.

He also redid the inspection... and everything else passing approval, I should be in and out on Monday after handing the packet back to the same supervisor.
I had intended to go to the Folsom office based on recommendations, but as I'm all set at the Carmichael office (my usual stop for things DMV) I will be there at the crack-of on Monday. No sense taking chances.
But take this scare as a confirmation of the 0000 model year requirement - apparently some DMVs let a stated year slide but it's wrong, wrong, wrong and will get you stopped in your tracks.