Flattening the ends of Dowels

I was working in my garage the other day when I ran into trouble. I wanted to make the end of a dowel I had just cut flat with a detail sander, but I could not do it. I kept getting a slight angle, and every time I tried to fix the angle, I would get one the other way. So I stepped back for a minute and came up with this jig.

The holes I drilled are the exact size as the dowels I need sanded.

I pounded the dowel into the jig...

and sanded it down to the face of the jig.

Now the dowel is perfectly flat at the end is sanded smooth.