I too am considering a domino. I currently have a horizontal slot morticer attachment on a minimax combo machine, however, I've never used it because I just can't imaging accuratly forming mortices with it. It appears I'd have much better luck with a domino. My dilema is which one? I'd love the ability of the 700XL, particurally in light of the fact that my 1st project with it would likely be joining very large boards in a workbench. But can it be reasonably expected to do the work of the smaller (500), i.e. - face frame joinery?