Oh, my. No, I didn't know you weren't dealing with the original equipment. So, definitely, you should follow the instruction from your doctor. Did they give you a user's manual? (I'm being slightly facetious, but only slightly, since as a technical writer I'm a great believer in user's manuals.)

I hope that all continues to go well for you and I'm very glad that you were able to enjoy yourself so thoroughly in such a physical way. You must really treasure that ability, given the circumstances.