I followed the other thread, and there is no excuse. It seems clear that you spent a significant amount of effort and that the end result is a combination of both of your efforts. To not give any credit at all is simply mind-boggling. Hell, even if this person did not use a great amount of what you put forth, you would deserve some amount of credit for the iterative process. This person clearly gives you credit in previous posts and not in a later post. What gives?