pwillie, I have a McMillan stock with flushmount cups and I really like them. In fact, this is the second rifle for me with flushmount cups. The good thing about them is that they swivel so you don't have to worry about how you pick up the rifle with the sling because if you put adverse pressure on them they just swivel with the pressure. There's a small button in the center of the swivel that you push to release them. The only downside is that they make a little rattling noise when they swivel. You can see pictures of them on the McMillan website. If I were making the change I would send the stock to McMillan and have them do the work.
