This thread is always a lot of fun to check out every day, it's nice to see tt players just shooting the breeze. I've got a spare couple of minutes so I might just chip in my 2c worth.
I've played now for just over 30 years, most of it at a reasonably high level, and I can say with reasonable assurance that many of the high level players wouldn't actually know or care about stuff like topsheet overloading, bottoming out, throw angles, dwell time etc. They pick a rubber that feels fairly good when they put it on their favorite blade, then go out and practice heaps with it. Mainly the basics just over and over. With attention on fixing problems straight away.
Internet forums are the right place to come and talk about everything and anything related to table tennis. But if you are spending your time in the training hall obsessing over minor details when you can't hit a loop against a push with any consistency, you are worrying about the wrong things. If your technique doesn't allow you to put the racket through the hitting zone with speed, stable racket angle, and fast recovery, then you don't need to worry about topsheet overloading or which rubber to use, you need to be working on fixing your technique up. That's where a good coach and video feedback (especially slow-motion) can be very useful, in conjunction with hitting a ton of balls.
Remember, if you are under 2000, you have a lot of basics in your game that you need to work on. Focus on them in the training hall, them come to the Internet and chat about whatever you like regarding table tennis. Maybe even post a video of your basic technique for evaluation, you might learn something useful. Heck, after 30 years I learned that I was hitting my forehand too far in front of me, once I changed that my forehand went from being mediocre at best for 30 years, to a real powerful weapon. But I never thought of making that change myself - I had to talk to another coach to discover that.
Anyway, I'm starting to ramble, so I'll sign out here. Cheers all.