Here is my question in a thread called "Einstein's Clocktower" posted by someone else. I think I asked about relativity another time somewhere but can't remember exactly when. Maxdancona gave me a lot of good information.
One of my first questions was "Where is the center?". You responded as did a few others.
If you click on my name it should bring you to my profile where you will see a list of my posts. It's way back at the beginning, but then I've only been on here for a few months, so not that far, really.