ringmir,
If you live in CA, you can get the S&V disc for about $15
at Fry's. Definitely, get a tripod. It makes adjustments
a lot easier. I got my digital SPL meter at Radio Shack
last week and everything came together. I tried calibrating
with the analog version, holding it with one hand while adjusting the speaker levels with other. That was a pain.
I got a lot of suggestions from the board members. Hope
that helps. Good luck.

stevel