Usman, i appreciate your enthusiasm for discussion on the spiritual aspects of the keris. It is a topic that is indeed very close to my heart. I would suggest that if you want to have this discussion that you just begin yourself and see what follows. If you wait for others to begin you might have to wait for some time.
Tayuh as i understand it is a practice used in Kejawen to determine things through metaphysical means: past or future, find lost items, determine causes and cures for disease, etc. Please correct me if i am wrong.
The keris can and has been used as a tool to facilate this process. While i believe that tayuh can be discussed in a much larger extent not necessarily specific to keris, i would suggest that for the sake of topic and context that try to focus the discussion on tayuh only as it relates to the keris itself...but perhaps that is not possible.