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Tony.  All the E6 does is mimic the triangle of velocities.  As long as drift, the angle between the radials is correct, the rest follows.  1. Make a card pattern of the size of slide you want.  2.  Leave about 50mm at the bottom for a square grid for solving other problems e.g. crosswind component for landing.  3.  Decide on the max and min speeds you want and divide the top bit up into an equal no of divisions.  Fives and tens are common.  4.  Plin slide on drawing paper and extend centre line down from min speed to where zero should be.  5.  Draw arcs using centre zero through the speed points you've marked.  It's usual to mark values on the tens.  6.  Draw in the radials one degree appart. Perhaps the fives could be slightly thicker.

Clearly, once you've got the idea, you can draw it again in one go beautifully.  Use your prototype slide as a pattern to cut out the bit.you want. Dave P