I have been using mechanicals for about 5 years now and can find no problem with them. This year I tried something different. I am using a drop away rest for 3 Ds and I tried it for bowhunting. What I did was fletched my arrows with six fletch, 2" long and some other lengths. My bow was set up with a quarter bubble above 90 degrees and 5/8" from the sight window for center shot. I tried muzzy, and various other blades that I have accumulated over the years. All of the fixed blades seemed to fly as good as mechanical heads and I tried them all the out to 35 yards. This is something that we used to try for field archery with a flipper rest and with the proper set up you could shoot six fletch very well. With the proper set up this may help if you are having trouble shooting fixed blades.