http://www.ebay.com.au/itm/Long-Mast-Extension-Universal-Joint-windsurfing-windsurfer-sailboard-sail-board-/162531439648?hash=item25d7a0f420:g:u68AAOSwZ4dZKrfH
I think it is long so, rather like a lion tamer uses a chair, we can keep the adoring crowds at bay.
I mean, anyone who used a 12.5 back in the day, on a Tyronsea330 will certainly understand.
Don't think there are many left from the " Back in the day" era. lol
I think you're correct.
Those extensions would be very rare now, I don't many would be left at all.