Wow, Kay, I am just now reading this thread -- so sorry to hear all you have been going through. Once again, you are my hero -- Web is lucky to have you on your side.
My husband, Jim, also got his original tube replaced with a Mic-Key last month. All went fine, (although there was a great deal of pain, I will insist on medication next time), and the site has stayed clean and dry. It's much better for all the reasons you mentioned.
But, we got some great advice from the endoscopy nurse that I'll pass on to everyone: she suggested ordering a back-up Mic-Key kit (that we store at our house) just in case something goes wrong and it has to be replaced in the ER or endoscopy center on short notice. She said the tubes that are stored in the ER are like garden hoses and are horrible -- just as you are experiencing yourself.
So, we took her advice and now have a complete, correctly-sized back-up Mic-Key kit ready to go just in case. (We waited 4 weeks after the procedure to order it so that insurance would cover it.)