I'm seeing these little jewels for $40 or so on Amazon that look like they should make quick work of creating cavatelli. My question is whether these work, and whether they work better than the add-on attachments for the "dough roller" type pasta makers (which also say they do gnocchi and another shape as well). Single purpose device: Add-on to pasta rollers: Any specific recommendations would be appreciated. Also, if anyone has any advice on the Atlas 180mm (7") roller vs the 150mm roller, I'm interested in that as well. I'd like to find a 10" pasta dough roller, but then I'm into commercial stuff and megabux.