Makita 9403 - dust jam - clear in 35 seconds

Makita 9403 belt sander. After 2nd use I noticed the bag was no longer collecting the dust. Eventually got round to finding out why. Was surprisingly simple. Take out 4 screws from the side the dust pipe (whatever you want to call it) is on. Take off metal plate and you should find all the dust causing the jam. Clear out, put back together. Done.