Instead of lapping the blank by hand, Laurie Hall built this mirror grinding machine from scratch. His site has notes covering his mirror creation machines and other projects.

The attachments compatible with these machines have magnets to hold them in place on the surface grinder head. Since attachments may need to be switched multiple times on a single application ...

When working on any surface preparation job ... so having an extra plate on site can increase machine uptime. Alternatively, the 8274-4 grinder is driven by a Kevlar belt — while this is ...