Man, I ordered a set of 10-lb clubbells on December 26 and I got them January 10. I took one out of its box and as I held it up for inspection, my first thought was... did you wrap the 10 lbs around a 10 lb core?
I weighed it later and was a bit chagrined to learn it truly was only 10 lbs. altogether.
Wow! Reading about the leverage factor and how the offest center of balance was designed to work simply did not have the impact that the initial sensation of holding it did.
Now I'm even more excited for the video to arrive! I ordered it the same day, but haven't received it yet, so I'm studying the book to deduce proper form for the moment.