I have to disagree with the Muzzy modification. I put one on my LX and it was as idiot proof as you can get. Watch the video ,read the instruction, install rest, shoot bullet holes thru paper, smile and enjoy a great purchase. Some may have problems but the 3 I' ve put on (2 standard and the roller guard) have been extremely easy to install and tune. You may have a problem picking an arrow, as everything I have shot thru these rest seem to fly like darts. Don the happy Muzzy owner.