Hey BIG NORM,
I never had the pleasure of meeting the man, or seeing one of his masterpieces in person, but I have followed his work since I saw the first article about his Luger modifications back in the 70's...
Here is a photo of him with one of his beautiful Luger carbine creations.
This photo came from the latest Luger e-book "Luger Models" and accompanies a lengthy article on John with many photos of his work.
I recommend this book to anyone who has heard of John's Martz's amazing work.
http://boards.rennlist.com/upload/JohnMartz.jpg