Telescoping Flagpoles as masts.

Group(s).
I opened my yap about this a while back.
Since discover they are available on the N American Continent for
$320 including P/P.
http://www.dcmfg.com/Flagpole.htm
Primarily Flagpoles, I gather the've done service as masts as
the revolving stand is also described as a deck mount. (+$70).
They come in 16 and 20ft heights, which probably means
4 ft sections, & fully dropped between 4 and 5 feet.
I figure they would work well with a wrap-around sleeve
 mainsail of the type Wharram advocates,
and they would be handy on trailerable designs.
Jeff Gilbert.