Jared, sorry didn’t see your facebook email 'til just now. Here is a rough pattern:
Of note:
- This is basically half a rugby ball.
- If the points marked with the orange circle are 90 degrees, you get a flat top. If they are less (70 degrees) you get a point like a rugby ball. Don’t make them more than 90 degrees, because 4 x 90 degrees = a full circle.
- Make the circumference a few cm bigger than your hat measurement.