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If you are 3.5 level your swing speed is not great nor is your spin control and you need a lighter racket. I would suggest racket around 10oz, 9.6-10.4, 100 sq. in.
Do not buy heavier racket, 10.6...

I am running an event for 20 players where every player plays with another once and against them twice over 19 rounds. I had a book with that rotation but lost it and I can't find anything online. I...