I've been using my 4" rotary sander to make my channels lately, but it is noisy and dusty, so I though I'd make a hollowing plane. I found some white oak in the rafters and roughed out the plane in about an hour. I had an old orphaned iron i'd been using as a scraper, so I reshaped it with a slight radius and put an edge on it.
After some finishing, it looked like this:
Nice! Even better, it works quietly and makes no dust.