Just like to let you folks know, a few weeks ago, i was having problems with my jiffy 8" not cutting, unless a lot of weight was applied.
i followed the jiffy website directions, and they didnt help, so i went about things myself. i ended up shimming the blade, so that it was at a steeper angle, and that did the trick.
the thing cuts like a hot knife through butter.
let my buddy know..he had the same problem with his 10", and it worked for him too.