One advice, helpful or not: stop complaining about yourself.
If you get in touch with people with a "I'm too old" in mind you're nearly 100% sure to fail.
Accept yourself as you are, work on the parts that you don't like (OK, age is a thing you can't really work on, except for accepting it) and then, if you're OK with what you see in the mirror, you'll be able to convince others to like you and what you do.
Instead of asking the forums if a or b or c is the right answer, go ask yourself with what you would be happy.
And please, don't take this post as an offense - but after following many of your posts you seem to me as a person that rather whines about his situation than trying to change or accept it.
Sometimes rough words from a 3rd party help wonders (and sure, sometims not - if so, I'm really sorry!).
Oh, and regarding your follow up call - don't call unless you're sure you've convinced yourself of being able to land the job.
If you are - go for it! Let them think about one or two weeks about it and then nail them down.