Well, I got my QAD Ultra Rest in last night and mounted it on my 2005 Hoyt Protec. Before removing the Whisker Biscuit, I took careful measurements of the where the arrow lies relative to the bottom and side of the arrow shelf - because the bow was tuned perfectly with the WB. Pretty easy deal to set up. It was a little noisy until I attached the camo mole skin they provide. Went out this morning and shot about 50 arrows. Point of impact was right where it was with the WB - and, although this bow shot well with the WB, it shoots even better with the QAD. I was playing with deliberately torquing my grip, and am convinced that this rest is more forgiving than the WB. Right now, I don't see a downside to the switch. We'll see what time in the field reveals.