i was able to finish my new project a mechanical bumpgun. my purpose for this was to find out does it make a difference? and my initial findings were, even though it was performing as i expected, however it was tottally far behind from an ordinary bumpkey hammer. the bumpkey is 99.99 effective compare to my bumpgun. please see pic.
http://i302.photobucket.com/albums/nn11 ... 040831.jpg