Bill;   In JEGS catalog, (1-800-345-4545) a Moroso spiral configuration
muffler quite similar to the ones Ed is experimenting with is available for
59 bucks in case the headsets don't handle the noise.  I guess if the
dishes' fall out of the neighbors cupboards when I take off I'll look into
noise abatement, as the farm borders 3/4 of a  mile along the village.
Everyone wants to live next to an airport, happens every where.  JohnD
Rusty if I have the PVC pipe powdered coated will it stand the heat, sure
would save a lot of fab. work