To secure the nuts holding the screws through the ballinks I use CA. But I apply CA to a needle and then let the needle touch the threads beside the nut. Never apply CA right from the bottle, it is to ask for trouble.
I replaced the pushrods for ailerons and elevator with 2mm and did NOT use the E/Z-connectors at the servohorn! You ask for slack, and I don`t trust if on anything else than small depron-toys... Instead I prefer a L-bend and use things like these to hold them: http://www3.towerhobbies.com/cgi-bin...?&I=LXAZC3&P=0 I would not use Z-bends either when I want slack-free connection, because when you Z-bend a pushrod you squeeze it enough to destroy the hole in the servohorn when you attach it.