"Rich S." wrote in message ...
Whatever you do... don't tell them it's for an airplane... 
Learned that lesson well when I was building. Example - an automotive spring
shop refused to sell me some leaf spring stock until I came back the next
day and told them it was for an invention for the handicapped and NOT for an
airplane. Spring stock fer Pete's sake!
I like to tell them I'm building a variable oscillating frambulator.
That pretty much results in a blank stare from the other side of the
counter, and an end to the questions.
John Galban=====N4BQ (PA28-180)