Yes, that's the one. I looked around but couldn't really locate the original threads (not surprising) that facilitated his eventual move away from Flight Sim. Reasons aside though, he was an awesome modeler and Bill always included some terrific eye candy to go along with his creations.I had a vague memory of it being to do with criticism of his Tripacer, which is alluded to in this thread:
https://www.avsim.com/forums/topic/46204-new-tripacer-from-bills-custom-classics/