Aw heck, you did the Sheldon conversion because you were saving your old bike.
You only have one gear, why? The simlicity thing is generally about the pursuit of other stuff. EG I can focus on the simplicity that is so calming. Haha
I don't know why you left off the other brake. I think it is this simplicity thing again.
Your bike is heavy because it is old and made of heavy metal. Which has been great for music but not so much for bikes.
I know you care what others think, we all do.