ORIGINAL: Straightarrow
The rest is designed to be shot with the bristles only touching the arrow on the bottom when the bow is drawn. Mine are always setup very loose - you might say sloppy.
Thisis very important if you want a quiet rest that won't damage your vanes (even the cheapest of vanes). I shoot Beman ICS 340 Camo Hunter carbon arrows and I use a x-large opening. My arrow fitsloose only resting on the black bristles.I have found only about a 2-3fps loss in arrow speed. This set up is very quiet on the draw and does not damage my vanes.
It's IMHO the best hunting rest on the market today.