I found some other discussions about it - the first one also has a lot of links
https://forum.tudiabetes.org/topics/colonoscopy
https://forum.tudiabetes.org/topics/colonoscopy-anyone
https://forum.tudiabetes.org/topics/pump-and-colonoscopy
https://forum.tudiabetes.org/topics/bad-colonoscopy-prep-day-for-type-1