I looked at the locking mechanism on the miter scale. 2 obersvations : first the tab that rides on the top surface is supposed to contact the miter scale(miter plate). It provides a measured amount of resistance to the turning of the saw. This allows one to nudge the saw to a perfect spot and lock it down without the saw moving during the locking process. There are more elaborate solutions such as rack and pinion(like on the saw's bevel adjustment) but this is a simple way. A small amount of wax on the top surface only of the miter scale is real nice.Second, a problem can develop if the sprung piece of metal below the miter scale( which springs tight to the miter scale locking it in place between itself and the aforementioned tab) does not fully disengage the scale causing binding. I took the plate off and the steel has a registration for a collar which is attached to the locking lever. When the miter scale is unlocked the collar fits into the registration and pushes the steel down off the miter scale. The tolerance is very tight. If Festool simply made the collar ( which is on a small steel pin and is easily replaced) a hair larger in diameter the steel would be pushed down a little more, ie... never able to bind even if the miter scale was imperfect. maybe this has already been figured out but just my 2 cents. The design is actually very simple with no springs.