I am certain that you, like myself will not worry about the scars! I also had a five way bypass in 1995, and while the scars have indeed faded I still somewhat resemble Frankenstein when I am without clothing. But, as I am a relatively heavy old man, that does not happen except in the presence of a very understanding wife of just about 47 years!
And I am also very glad to hear that you are also doing well, please take it relatively easy, and continue to improve, your wisdom and knowledge are ever more and more appreciated here at this time of relative crisis for the space program!!!