If you are still unhappy you can go to the periphery port later and just
epoxy the side ports shut. You can
  assemble part of the engine and copy the side port timing onto the rotor
housing with a marking pen and
  a small square. I used a piece of exhaust pipe formed into a square on one
end, and epoxied into place.
  I think this will be "air show" power on a Tailwind.

                                               Lynn E. Hanover

 
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