Being the chronic tinkerer that I am,, I decided to make up a shoot through harness for my Guardian. It uses a double cable rod arrangement to keep the cables from turning and spread out a little more than what the old Proline spreaders that I had would allow. I shot it some and chronoed the set up with the exact same draw length and draw weight. I was expecting to gain a little speed but it still shot the same as the standard factory harness that came on the bow. What I did finally notice was that the shoot through harness allowed a bit more cable/cam clearance at full draw. I had about 1/8" to 3/16" with the stock harness and it went out to more than 1/4" with the shoot through. The other thing,, and that's why I went back to the stock harness was that the cams now leaned A BIT away from the factory cable rod. With the factory harness, there is no cam lean at full draw or at brace.
I guess sometimes there's not much improving to do on a great bow to start with
