>>393495505
that is a lie, index controllers have very cheap plastic parts for the stick mechanics. If you keep clicking you wear them out and the stick will keep getting stuck and the controller starts drifting. You can buy replacement parts and fix it again, but good luck desoldering the old mechanic. 
That is what you will need to do, you can also see the stupid plastic part they are using:
https://www.youtube.com/watch?v=oDngL_xFFyQ