I am looking for some help, anyone with experience with the McMillan A5 stock with adjustable thumb wheel? mine functions perfectly but when adjusted and set screws tightened, the whole cheek piece rattles around and will not stay firm, thumbwheel included. How is the base of the thumbwheel fastened to the stock? can I just glue it back in? is there screws that I dont see holding it in place? Thanks, Ron Tilley