Thanks for all the replies. Although I had been due for one since age 50 I had been avoiding it. I am a kidney/pancreas transplant patient (9 years ago) with no transplant related problems until year 8.5 when my new transplanted pancreas quit working on me. I am trying to qualify to get on the pancreas transplant list and in order to do so need a battery of tests, one of which is the colonoscopy. So I can't put it off any longer.
My gastroenterologist, who has a very good reputation, says I was due anyway because of my age. He told me that one in a thousand results in puncture or other injury requiring surgery. Due to my medical condition (reduced kidney capacity) he has prescribed the two liters of prep drink and pills combo instead of the gallon of prep drink only. Also, he said that the anesthesia would be the completely unconscious kind, which sounds good to me.
Mike D. - who has three kidneys and two pancreases (niether working)