Madmike....
If you want to see an extended (over five hours) video of John's hammer in use by three industry experts, order the UMBA video RD119. You should be able to find it on the UMBA website at
UMBA Online
I'm not sure videos are sold internationally, buy it wouldn't hurt to send a note to the Librarian (Roger Degner) and ask. If you go to the website listed above, and click on "Library", you will find an email and snailmail address for him. He provides these videos for $5 each (with a $2 mailing fee (regardless of number of videos ordered) within the states). I have no idea what international shipping would be, but I assure you it will be worth it.