I 'll start off by state that I love all of my other Bosch tool - from all the laser goody to to the pneumatic to my planer . but , whoever be in charge of put Bosch 's name on this piece of dung from Switzerland -lrb- where it be make -rrb- , should be fire ! actually , the tool do have some strong point ; e.g. , a light yet solid feeling , it be ergonomic & have the ability to be invert & use as table top sander because of its unique brick-like shape . however , the bloody platen be not wide enough to incorporate a standard 3 '' belt ! in other word , with the belt adjust all the way inboard , there be still circa 3\/16 '' of the outboard edge of the belt off of the platen & roller ... what a waste !!! I call Bosch Tech support & the guy have the nerve to tell I that `` some belt manufacture make they belt a little wider than standard & so they can over extend the roller & platen . '' I promptly refute , `` the belt be the same belt that come in the box from Bosch ! '' I tell he I would be send it back to Amazon & buy another brand . then he state , `` well , we 4 `` x24 '' be a much better belt sander '' & suggest that I try it . I laugh & bid he a good day ! I do not want a bigger sander , which be exactly why I choose a 3 `` x21 '' ! bottom line be the tracking knob be turn all the way in & the belt be still circa 3\/16 '' from the inside edge of the sander . if this sander simply have another 1\/4 '' meat on the platen and roller , I would have likely keep it ; but instead , another manufacturer will get my business ! come on , Bosch ... time to release a new model or find another manufacturer !!!