Don't know the specs on the Shack blower, going to stop in at the local one today, I'll see if they carry that blower and get some spec's. FYI the Shack use to stock the Nidec Gamma series DC Blowers, here's the link on the Gamma's with spec's might help to determine if it's woth the purchase.
Sorry about the bum link, I used search, typed in Nidec Gamma 28, selected the link, it let me right in, didn't have to use, no user name or pass word, I'm not registered on that site. Tried again while typing this reply access denied. Sorry again, I do Know the Gamma 28 puts out appox. 9 cfm, the Gamma 30 25 cfm. http:www.plycon.com carries the Gamma 30 blower.