http://www.karate-goju.com "How to Video" with Eli Elfassy Sensei. How to build your own chi ishi Things You will need for building chi ishi: 1. Wood Stick. Size varies 45-70 Cm; 2. Thin cans. (0.4 Liter up to 2.5 Liter). 3. Concrete ( Ratio : (1 cement : 2.5 Sand : 1 grit ) + concrete…