I do want to dome cover it, as well as build a back lit box around it. I have a template created for the cove lights over the stations and will use that to create a finished ceiling. That will receive a dome ceiling. Believe it or not, I have saved a few plastic covers that pies and cakes come in from Costco. Those might have the right diameter once the ceiling is in place. I'll do a measure today and post the numbers..
Love your pics. And I've got the same prob with my close-up vision not being what it used to be. lol!