Nope, I've seen it in a Skywatcher 7" Mak and an Intes 715 Deluxe Mak. Not just my eyes, but had a witness too when I did the last of my Cat testing in 2018. The pic below is of that final Cat shoot out between two very fine C8s and the Intes. How the three scopes stood up to the Encke under the very same conditions is what showed which scope was the pick of the crop. In this case the Intes.
If I had to chose from either one of those two C8's, and the Intes was not in the equation, I would have been just as happy with either one of those two C8's. I also still know where those two C8's are in case someone is interested in getting their hands on a blooming fine C8!
For clarity sake, I tested 7 scopes between 7" and 8". The other 4 scopes didn't make the shortlist for only one of two reasons, either optically not good enough, or mould was an issue. Alas, that 7" Skywatcher Mak had a significant mould problem
