I do not think your contributions are a waste of time, NO, they make me think of possibilities.
I know some others here do have severe problems with your posts because you 'shoot with hail' and rarely on target.
You tackle 5 topics in one post, you post real TOMES, and you expect people to read all of that.
No Puzz, people skip, they just pick up from your posts what they happen to be interested in at the moment.
You need to learn to focus.
I hope I do not sound like 'talking down on you', because I am not. Your posts have sent me on many searches. Maybe I should have stressed that more often.
But do not put alll your 'marbles' in one post.
Get that, goddamnit??