I was thinking of making my own hand-powered disc sander, i found two or three examples on the internet. I found that pretty usefull, quick, silent, cheap and lightweight. I want to use it not really for sanding little pieces of wood but sharpening instead. Using fine sading paper it could be a very quick way to sharpen scrapers.
The first is from Logan Graphics (130$) the second one is from Alberti Design (650$…. what?!) the third is something i made quickly with Sketchup. I bet i can do one with salvaged materials. I have some bearings, the rest will be plywood, maybe a plexiglas disc.