There is some good reading here. Sorry to the Chief, these are at your question.But very good points are made in this post.

The only input I have is I am going to shoot the fixed blades tomorrow that I bought today. I have always used mechanicals and have made some great shots. My complaint is there has never been a blood trail to follow. Drip here, 30 yards, another drip....... hands and knee action for tracking. Needless to say I am going to try the fixed blade this year. I will let ya know how they work should I have the opportunity. Good luck, and shoot some 3-d in the off season!!