There are a fair number of versions of Mr Berry playing this on YouTube. Each one is different and every one is goode!
I think I have the basic chord sequence OK now. I'm working on making it sound more interesting by adding twiddly bits and I'm supposed to be working up to adding a lead solo bit (although that's still a couple of weeks away).
...But I still am nowhere near sounding like Chuck! Sigh! I'm away now to practice my duck walk.