Could interest me. In match this WE, I lost a player with lower ranking, because I was tense, and I overshoot the table a lot. Next match, I beat a player with way higher rank than me (ex number player in france). Less tense, and it was fine. So, I guess a 2 speed rubber can help in those situation. In practice I can do some FZD BH, but in match never. Like I told you privately, I might stick to 1 playstyle with a more controlled BH. And either Nuzn 48 or H8-80 could do the job.
On other topic, I tried to change my BH movement, to mimic Ma Long's one. At least in my head it looks like it. It makes me reduce the arm and body swing, but increase the wrist rotation. At the end, the ball is more spiny but with less speed (not so much less speed tbh). I did less slice, and people struggled more blocking my BH, despite the ball being slower.
@victormanriquey NEW REVIEW is out, you did not tell us you were posting it ! Let's go and read, and get confuse on my BH rubber choice