hi   i have been using the following set up in all my 40-120 size glo planes      on the controls i use the sullivan red plastic sleeve-with a 2/56 metal rod inside it    -i slip very small pieces of nyrod -1/16 of an inch about every  2 inches on the metal rod -two things happen-any  play in the metalk rod and plastic sleeve is gone -and  very little binding or  friction from that set up -very direct -no flex   and direct feel i never use the kit supplied clevises-i use only the HATES clevises on my control surfaces-(with fuel tubing - locks over them )  -i use EZ's on the servo end -only with the nylon (not the metal hold downs )- supplied with them-   please remember i started to fly  RC when there were no ARF's and no computer radios -so all adjustments to controls were done mechanically-the best builders i knew used them -and i have said  " if i ever see one fail -i will never use them again  "-i still do and that was 24 years ago-  enough said      you must always - in some way secure the control rods near -or at the middle of the inside of the fuse  -or the flex that happens there will greatly reduce the direct force you want to be applied to the control surfaces-( elevator and rudder )  the control rod should also be as straight as possible between the servo and the control surface horn -so you are appling a direct force with no possible flex of the control rod-this will give you the control movement you need -to have the feeling the plane is directly attached to the end of that stick you are holding in your hand (TX)-the feeling the plane is flying on rails is what follows with this set up