Presidential is right...this is supposed to be a help forum. Granted he should "help us help him" but if we did take the time to educate instead of flame him these posts would stop. Or at least get fewer and farther between.
I do have a question though, why reinvent the wheel? Find a good long tube design and use it for the test you say your going to do...they are out there.
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If it has tires or boobs it's going to cost you money...