Looked at a used ex 21 this morning and it was reall noisy and vibrated badly at higher speeds. The " arms that hold and move the blade vertically can be moved vertically about a centimetre when the machine is stopped . They are really loose vertically.
i think drive cam or bearings in the horizontal arme shot.
any information re problem and fix appreciated.
i did not buy the saw but still interested if it is an easy fix
cheers
martin