The inherent problem suggested in some of the literature I've read about off-the-shelf Total Knee Designs, is that if this product, which isn't necessarily designed for your anatomy in the first-place, doesnt quite fit properly, it contributes to a leading cause of patient dissatisfaction following TKR surgery. And there is absolutely nothing one can do about a mal-aligned or mis-sized TKR with a generic-like off the shelf design once its' in; other than to take it out.