OK guys, Any one have any experience with the A.T.I. adjustable cheek rest for the 6-position stocks on the 535 ATS Tactical turkey guns? I was thinkin that this maybe just what I was needing to get alittle extra height and be able to use the scope or Mueller site. They range in price from $10 to $20 shipped. 2 out of 8 said it was useful but the other 6 said it wasn't much difference in their set-ups. Any thought?