Chris -
Peter's 17th-century style woodcarving is rather simple, repeating geometric patterns - I wouldn't get too hung up on sweeps - just something similar-ish. If you want to be particular, you could scale up the image from his website until the ruler is roughly at size and then compare it to something like the chart in the new Tools For Working Wood catalong (you can print that from their website, as well) for a decent idea of what a sweep number is going to look like compared to what he's using if that helps.
I really enjoyed his video, even though I haven't applied his carving style to anything other than some scraps. I need to get some slip stones before I start picking up more profiled tools, and right now I'd rather build what I can with what I have and spend money on wood.
I have the first DVD if you'd like to borrow it before you start chasing something new. I promise I'll get it out faster than that inlay stuff.
If you're at all interested in green woodworking, the book he recently did with Jennie Alexander (the joint stool book) is a great book as well. I really liked it. Heck, even if you're not interested in green woodworking it's a great book. It covers a lot more than the title would suggest and is beautifully illustrated. I know there are other books by Alexander and others on the topic, but the joint stool one is the only one I've seen. There was a fair amount of info from the book contained in the excerpt that was in in Popular Woodworking a few months back as well.
" Be willing to make mistakes in your basements, garages, apartments and palaces. I have made many. Your first attempts may be poor. They will not be futile. " - M.S. Bickford, Mouldings In Practice