Good filing comes second nature to me, i'm a locksmith and have done alot of presision filing on keys. That was the easy part for me. Hanging the weight is a good idea, just have to do alot of trail and error testing to get the proper speed. Thanks for the idea's, i'm still open to more or tweeking of the present idea's posted. When i get it finished i'll post a picture or two. well four Thanks again, jrrdw