ITF and Bundesliga. Plus Mechanical Engineer and Master Pro Racket Stringer. There are some things that where not talked about, but as its focused on incresing the sweetspot its understandable. What was not covered and should be here is what style of player fits what area of racket. 12 o'clock for spin players, weight in neck for more flat hitters and net players where more precision is needed. It was mentioned, but I think this is, from a player and an engineer, the message is being missed.

Clearly worked well on you though

For all we know the dampener could be at the top of the racket head instead of near the bottom at the neck.

Yep, Dunlop ATP ball.

Volkl Cyclone tour at 44lbs

Yes!

Yes, but physically fit people with good technique can usually swing heavier rackets. As you get better, you can experiment with weight