Not strictly homemade as I combine off the shelf parts but there was a lot of work that went into this mod.
An 8" 1400RPM grinder was the base for this, a multitool belt sander was fitted on one side (new holes had to be tapped into the body of the grinder) and the stone was left on the other side. The stock grinding rests were replaced with larger plates that have mitre slots, the belt sander also has a dust collection box that sits underneath for use when sanding wood. The dust collection box is free standing allowing a belt change to be done in a few seconds. It collects a good part of the dust but isn't perfect, may change it in the future, we'll see.