Weber make a 20" OM. Are you looking to commission a build or hoping to find a 20" OM? If it's the former then I'd probably throw some Irish builders...
The video is indeed of David A Gordon, one of Scotland's top mandolin players. He has had the 5-course Sobell for a long time and you will see it is...
Retired Teacher of English. Been building mandolins since 2005.
Play with a group of like-minded friends calling ourselves "The Old Bores" - have a look at YouTube for TheOldBores channel, though I now have the videos listed under my name - John Kelly.
Location:
Ardnadam, Argyll, Scotland
Interests:
Building mandolins and playing Scottish and Celtic music. The Scottish outdoors.
Occupation:
Retired teacher, reborn mandolin builder!
Signature
I'm playing all the right notes, but not necessarily in the right order. - Eric Morecambe