Dave,
making your bike lighter is a fun thing to do, but it doesn't usually make you faster. If the bike works for you the way it is, it really doesn't matter how much it weighs. My bike is light when I strip it down, but I like to carry along the stuff I need to support myself on long rides. So it weighs a ton under normal circumstances. I still love to ride the thing, and the truth is I weigh a ton too. I'm a little less than 10 years younger than you, and a couple of years ago I realized that I just like riding my bike. I have nothing to prove to anyone, I don't have to go fast. Frustrates some of the people I ride with, "you want to go faster? See ya"