skytrooper,
i really like the evo 5, but i have only ran it about 30 times in about 2 years... i miss my car... i am apart from it when i am at work (like 10,000km).
i second Tryhard's advice. Definitely screw things down equally tight (well try to at least make sure the "feel" is the same for both left and right. The arms should move up and down freely without binding. Sanding the arms VERY slightly is good, i don't remember how... but when i built mine... it didn't bind... i used the titanium nitrate (nitride?) coated shafts. They are very good.
Another thing with screwing things down... is if u have metal to metal connections... add a very very very small drop of thread lock to keep the vibrations from losening the screws. I know some people will say metal to metal will cause binding... but i have lost too many titanium screws at the bottom of my chassis already...
becareful not to put too much threadlock... otherwise... u will never be able to unscrew the screws... causing even bigger problems!