Some servicemen in the late 50’s studied the form, Sherman Harrill being one, but many didn’t as it’s use was replaced within Shimabuku training.. When Shimabuku developed his Kusanku Sai kata, part of Kyan No Sai was incorporated leaving a double Kyan influence, first with Kusanku as the base form and then as the possible originator of his sai technique. Here is Shimabuku Sensei emonstrating Kusanku Sai.
** Notice the Kusanku Sai kata does not include kicks. Reportedly, because us of the sai was to do the fighting. **