It's one thing to criticize and pick apart something that you made while it is still yours. It is another thing entirely to criticize, deconstruct and find fault in something that you created but that now belongs to someone else. I'll try to come up with an analogy. You spend a couple of years restoring and rebuilding a car. It's a beaut. You've put a lot of sweat and labor into it, and while you were doing so, you went back and "re-did" some things on it. You realized that the seats you originally put in were comfortable, but they were the only ones that you could find at the time and came from a different model year. Later you found a better match, and re-replaced those seats that were "good enough at the time, but now you know/have something that you consider better". You work on the car like this for a long time. Some parts get put on and they are perfect, others are compromises and you later improve/replace those compromises. But eventually, the work comes to an end and you polish her up, and put her on display for auction. Someone sees her, loves her, notices your attention to detail and the work you've put into her and makes you a damned fined offer. You drive off richer, they drive off with something that is now theirs and they are very proud and glad to own. It would be in poor taste for you to then publish an article detailing your restoration of the car and explaining what points that if you "had to do it over, you'd do _____ differently" or "the _____ I installed? I knew that I did it less than properly, if I still had the car, I'd do it this way". It was your car and your work to criticize when it was in your garage. Now that it's in someone else's garage, it's theirs. They can respect, examine, change, undo or even ask to themselves "what was he thinking when he put in this part?". It's their car to have and to do with as they see fit. But for you to criticize, re-examine your previous work, or even critique their changes? Not really classy. Especially if you've got another project in your shop and you're busy with it. You had your time with the old girl, it was grand, you did good work, and the new owner's happy/proud of it. You should be too. But it would be in poor taste to criticize the car in another man's garage, even and especially if it used to be yours and you put your time and effort into it.