My orthopedic doctor asked if I had. She's thinking an ill-fitting trike could be the source of my back pain. I have absolutely no pain while riding. In fact, my back feels better the more I ride. I told her there were no trike dealers within 200 miles and I'm not certain that a bicycle dealer would know how to fit someone on a trike.
Also, I have the issue with my custom handlebars. Most dealers would tell me they are dangerous but I love them and am so glad my hands are away from the wheels.
Have you ever had this done?