Received it as a gift - like most reviewers I agree that the screws are wrong, they don't fit the slot properly and make it difficult to insert the slider into the table guide. I will probably throw it away and not dissapoint my daughter.Also one of the turn-screw threads was filled with plastic - took me fifteen minutes to clean it out enough to thread it on.The push stick is rounded slick plastic and I would have to put some rubber or something on the end of it before trying to use it.The cheap plastic has sharp edges and must be trimmed and cleaned up for any sustained use.DON'T WASTE YOUR TIME OR MONEY ON THIS PRODUCT