Kris,
Do you have a link to the Tornador site? I did a google search and couldn't find anything. I went to the site that is at the end of the video on AG's site (tornador-gun.de), which list the same requirements as AG lists (9.5 CFM, and roughly a 13-gallon tank IIRC). That was a couple of weeks ago, haven' checked if anything has been updated.
Interested in getting this gun, have a 4 gallon compressor that puts out 6 CFM at 90 psi. Would probably get a small add on tank (10 gallon) if I found air quantity to be an issue after purchase.
Thanks,
Neil