Yes sir...you are absolutely correct about the need to get a colonoscopy. It's very simple and easy, pretty quick. The colon prep is truly not as bad as some make it out to be. Trick is to lay off of major, heavy food for the day before.
I used to work in an endoscopy clinic and involved in thousands of them. The fastest, easiest way to rid yourself of potentially cancerous polyps and lesions.
Another thing, nothing beats an actual colonoscopy. The tests where they have you send in samples are not 100% accurate. Besides, even if they do indicate an abnormality, you still have to get scoped.
Do it.