It may amaze how easily you can slip back into being sinister. I had a friend when I was growing up that was a righty. Then when I moved back to my hometown I was helping him with something and he mimicked me using my left hand and said it felt so natural. He had been using his right hand for everything for 25+ years and now does it all lefty finally.
Nah. I hosed my ulnar nerve and it's a freak show. I'm no longer a good candidate for the resistance. Still, it was a neat parlor trick when the physio picked it out.
But I guess I shall have to content myself with living a year longer or whatever they say.