I have a delta x5 jointer, I just picked up some jet jj6-k or 708801 knives at an estate sale thinking they may fit. After some research the delta knives are 3/4 in wide, the jet are only 5/8 the other dimensions are the same (length/width) can I use these knives? If not does anyone have a suggestion on where to sell them? I have 2 sets brand new in package.