I got one for you.
Lately, last 20 years, I've been prepping with an aligned wrist.
3 weeks ago, heading back towards heavier rackets, I used my old prep (from 1977) of a bent FORWARD wrist, so the racket sort of wraps around the front of my body on prep, pointing to the right service line, me lefty.
Serves were for sure, bigger! More RHS. Tiring, hard for me to do repeatedly.
Instead of prebending to load like you'd think, I'd prebend the opposite way to get more rackethead loop for faster speeds.