The Beta75 Pro frame is resilient, but a bit too flexible. I used this brace to stiffen the frame a bit when it's used on the Mobula7 whoop.
Update: added
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a befier brace for those that might prefer it.
Mobula7 Whoop
https://www.banggood.com/Happymodel-Mobula7-75mm-Crazybee-F3-Pro-OSD-2S-Whoop-FPV-Racing-Drone-w-700TVL-Camera-BNF-p-1357971.html?p=CX200419332836201802&custlinkid=59500
BetaFpv Beta75 Pro frame
https://betafpv.com/collections/frames-props/products/beta75-pro-micro-brushless-whoop-frame
