Last time I was in Korea both at national demo team try outs at the KKW and the KKW demo team tourism at the temple site they would use instep especially for multiple rapid speed in air kicks and we have hosted the Korean Tigers demo team at our NW headquarters for 30 years and also use instep thin board due to age and repetative kicking.
I have nice picture of the temple demo in Seoul but didnt seem to post when I attached to this??
I have nice picture of the temple demo in Seoul but didnt seem to post when I attached to this??