Well, I picked up a pack of the G5 Montecs yesterday and got a chance to shoot them this evening. I am very impressed with these heads. I screwed them in and spin tested them to find that they spun true. I had them shooting tonight out to 35 yards and they were grouping with my field points. I then decided to put both of my bag targets back to back and try a shot, and it just flew through (the arrow is a 28.5" Gold Tip XT 75/95).

I will let everyone know how they work out for me when I get more shooting time with them and hopefully when I send one through a P&Y this year