They do have thier use, but for high speed and aerobatics, nothing better than the nylon hinges. I quit using the CA hinges after having a couple fail on a pre flight inspection. This is just my thoughts, but they appear to degrade themselves on the hinge line if you have throws that are outside the norm. The 2 that I found were actually starting to tear on the hinge line. I also think that as they get older, they will allow some flutter on the control surfaces. I am sure that there are those that have never had any issue's with them but as I said, just my observations and I now use only nylon hinges. Good Luck, Dave