I would really check around Bob , lots of plastic in those New Wave CNC's and unsupported rails , while I don't have one I've read a lot about them on other forums , speed and flex seem to be issues with them . Rigidity in the frame and gantry goes hand in hand with accuracy . I do have a CAMaster Stinger and have a buddy that has a ShopBot DeskTop , both of which I can speak of , but money wise they are quite a bit more than a Piranha . When I got into CNC I saw an adage posted on most of the CNC forums , "buy your second machine first" . I think that could apply to other machines like saws , lathes , etc , but to me seems very appropriate with CNC's