I tried the multiply approach but it didn't work out for me. I found myself never accomplishing anything. It sort of reminded me of this one time (fresh out of high school) that I went to my hunting camp in the dead of winter, at night. The place is only heated by one fire place, one old time cook stove and two pot belly stoves. I had a total of four fires to start to get the placed warmed up. I thought I would multi task and get them all going at once. Well, the only thing I did was jump around from fire to fire. An hour later I still did not even have one fire going.
I stick with one until it's finished. If I can't do any work on the rifle, I make he sideplate, nosecap, etc.
Brian