Great giveaway John,
these tubes are down spars only for SUL or standard sailed kites, PERFECT option easy to compare switching back and forth. Someone is gonna inherit some irreplaceable items, discontinued decades ago.... RARE and DESIREABLE
the taper forces more weight forward resulting in a better glide when leading edge down doing field recovery
envy to the winner, PM me if you want to unload, trade, sell, donate to a worthy cause?
-plm