Timer improvements

Current specs:

1. Pendulum bob is around 2 oz
2. The barrel should be 1/2"-3/4" diameter and about 1" long
3. The hand should be about 2.5" long

Working off the timer improvements list...

1. I replaced the pendulum hanger with plastic.  Much more rigid, and keeps the pendulum where it should be.
2. The gravity arm hangers were remade.

They're two-part pins that press together.  This took a bit of doing since I misjudged just about every diameter and had to remake them...  But in the end, they seem to be an improvement.