Thank you very much! No designer...just my ideas with years of construction help from my dad and good friends.

Thank you for sharing, im learning how to shikko.

@srdreed Your observations are correct, but myopic. Please check Yoshimitsu Yamada's book "The New Aikido Complete", Don Draeger's classic "Judo Formal Techniques" & Shigeru Egami's "The Way of Karate" for interesting variations. The best advice I can pass on to you from my 40 years of seiza practice was given to me by my podiatrist, who after telling me I had a bone spur in my left foot said "try sitting on the right foot!" lol ...ya gotta have balance :)