Do not want to mention names on an open Forum Kevin, All I want is advise ,the Rocky has the option to add weights and would it be woth investing in a set of the above, and what advantages would it give me.This started as a hobby for me and, if I do something I do it to the best I can, I do invest in equipment. The results on the floor MARBLE are not outstanding just trying to get it better that is why the question about the weights