Twist three sided formThe difference here is the marking of the ends. Using the tool rest draw a line across the body of the cylinder. Mark the first end as above. At the other end draw a line through the centre, 90 degrees to the first line. Now create 3 turning points and number 1, 2 and 3 as per diagram 1. Now remount the blank 1-1, 2-2, 3-3 and turn a flat surface. Be very careful and move slowly, check frequently. American TwistMark out as per the simple triangular form. Colour code or number. Then mount the piece as per the following 1-2, 2-3, 3-1 or R-B, G-R, B-G, see diagram 2.