Oops, I was actually replying to Siguy, but your latest post got in there before me, Amras...
The plural would be "kestrosphendonai", I think. Hondero has built several kestrosphendonai. I have built but one kestrosphendone, and it wasn't the (reconstructed) traditional design, it was
Jurek's design
. See replies #12, #15 and #39 for detail illustrations on how to load Jurek's kestros. It works well, but it is slow to load.
(edit) ACK! Siguy, I am really slow today ... your latest post also got there before this, my reply to Amras... oh well.