DustFilter For the Vertex K8400

Found i had dust jams too often and found otherdust filters too hard to mount properly on this system so designed a new one.

Things i did differently compared to other dustfilers i saw back in the day:
no need for other/longer schrews, axels are 1.75mm filament.
a locking mechanism to prevent unwanted opening due too filament travel (there were a few with locking mechanisms but either didn't fit or were too hard to open to insert filament).
mounting slot instead of a hole making it possebl