Here is some addons for Mini belt grinder, that you can easy buy in many China e-shops. Just google something like Mini Electric Belt Sander Adjustable Speed Grinder DIY Polishing Grinding Machine Cutter Edges Sharpener 15/25mm Belt Sander

This is excellent tool for knife sharpening. I made some addons for 2.5 cm version of grinder, that make working process a bit easy and cleaner:

1. Platform to easy and precisely maintain sharpening angle.
2. Dust cover for motor.
3. Dust cover for bottom electronic compartment.
4. Dust tray to connect vacuum cleaner