David,
First, congrats on a nice speed goat! This past season I shot a turkey from a blind without the mesh up - great flight, no problem. Later, I had another chance at a turkey from a different blind, this time with the mesh in place. 8 yd. shot and hit the bird right between the shoulder blades AND the arrow bounced off and the tom walked away!!!! Same set-up each time and shooting the wide Centaur head. I'm a believer that, with that style broadhead, mesh makes a difference. God bless, Todd