Periwinkle,

I don't know the different models you talk about, lots of these machines are made by the same manufacturer, but just have a different name on them. Check out this site, these guys are in Seattle, they could help, you could call them too:
http://www.vacuumpackers.com/

-N.
_________________________
Allright all you saltwater anglers, check out www.salmonuniversity.com