Wow, I hope you feel better soon.
I'm going through the same thing right now. Bad tendonitis in my left elbow, the one I usually use to hold the pouch. I had to change hands and am now holding the slingshot in the left hand. For whatever reason holding the arm extended with the slingshot doesn't aggravate it, so at least I can keep shooting. It really didn't take long to start shooting ok.
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