It was really interesting to see how someone just used an analog synth to recreate the 808 cowbell. Why not, right? In the other post I made in this thread, I talk about differences in 808 cowbells from song to song and wondered if "manufacturing anomalies in the analog components accounted for this difference."
It's quite possible that some producers weren't using an 808 at all, but rather by using the methods described in your link, created their own specially-tweaked 808 cowbells in order to give it the exact sound they wanted.
The whole series is a valuable guide to analog synthesis.