The Hogg Wrap is an absolute must. I bought the SDP a few years ago and went to Montana where we were getting after it every day (REALLY long days). I busted ALL of the fiber optics out of the sight and ended up down in town part way through one of the days to get new fiber optics. When I got home I promptly ordered the Hogg Wrap and it hasn't happened again.
Before I went to Montana I happened to be in Boise and went to Cabelas. Cameron Hanes was in there (just a coincidence) signing books and had his bow there. I was there right when they opened and hardly anyone was there yet so I got to spend a couple of minutes bs'ing him. He had the Hogg Wrap and said that without it you'll bust off the fiber optics. I should've listened and bought it before I went on my hunt.
It makes the pins much brighter, as well.