I have read so many threads on CA hinges failing.I must be very lucky.In the at least 8 years of flying aerobatics to the max and the odd crash,I have actually never had one of mine fail......yet.Maybe it is the glue that some people use,and I also have heard of people using accelerator when installing these hinges.That is a big no no.I have flown at least 20 different aircraft on CA's mostly 40 -1.20 size aerobats. my 2 cents