That's absolutely awesome congratulations and of course doing an epoxy seaing film is always a great idea.

Usually with centers like that I just use larger pieces and use quarter or 1/3 chunks and then work it into a cylinder.

Using lower speeds and a simple double cut bastard file I was able to work the large protruding edges down and off until it was much more closer to being fine machined into that perfect cylinder.

However sometimes you just find something that you want to create and you just have to work around the limitations that you're giving.

Phenomenal work I appreciate it!