Congradulation on your new preamp. I’m also 72.
It sounds like you are getting amazingly good sound out of that OPPO. It is great that you have such a large vinyl collection. But thinking ahead, you might think about streaming. You can get the same sound quality and not be confined to vinyl as getting up and changing records is not going to get easier. I’ve got 2,000 pristine albums which I never listen to any more. I now spend my time exploring new music. Just something to think about.
George