Tuan Cedric, thanks for sharing your knowledge too. I have been wanting to find out the significance of the hand signs and the postures for a long time.
I await your next post eagerly.
By the way, is the Alidha/pratyalidha standing position expressed in keris hilts? So far, I have only noticed the Rajalila asana position where one knee is up, the other leg down from the throne. Thanks much!