weargustinThanks for the quick reply , even though the two comments are a bit contrary . Items that are duplicates could be finished at different times ? Also a bit weird for grab bag items to not be finished yet . Oh well , the $ 20 shipping per item kills the deal for me . <| sep |> Looking forward to seeing more of their travel series . Pretty nice rides from the looks of it <| sep |> I was born here , lived here all my life and am experiencing a similar catch 22 scenario . I have the qualifications but not the 25 years experience needed to get the job . <| sep |> As a tool , Yes , in vibratory stress relief you shake a part at or near it ' s reasonance frequency in order to relieve residual stress without the downsides of thermal stress reliefs . That being said the jury is still out on how it works , it only works for certain metals and many metallurgists just think it ' s fatiguing the base material . The only other thing I can think of is creating standing waves in high Q cavities for some super specific nozzles and sound engineering applications , but that ' s not really for manufacturing .