I was actually very disappointed with the lack of instructions and quality of the cams as well as other parts.  Several cams simply split on two...frankly they were junk.  There were no directions... zero, just pictures.  I have installed quite a number of pieces of furniture and I have never seen such lack of directions and lack of quality in the parts.  Take my advice is pay the extra and have it installed before it’s delivered, it will be well worth your time and money. Now that it is installed it looks okay for the cost but I have to wonder just how long it will last with a sewing machine vibrating on this table.