I saw a guy demonstrate one at a gun and knife show last year and it seemed to work pretty well. While the design would allow for adaptability connecting to various dust port sizes my particular issue involved connecting to a harbor freight 4×36 belt sander with 6 sanding disc.
Harbor Freight 1×30 For Knife Making Review And Mods Youtube
Upgrading A Belt Sander To A Belt Grinder Grinders Sanders Etc
Harbor Freight Belt Grinder Free Video Search Site Findclip
If youre not against belt sharpeners they make belt sharpeners you can use to sharpen knives scissors or whatever.
Grinding Using A Belt Sander
Knife Grinder From Harbor Freight Belt Sander Part 4 Vidly Xyz
Manual For The 97181 4 In X 36 Belt 6 Disc Sander