i have a device thats pretty fun,i used a ceiling fan without the blades mounted vertically,on a stand with a heavy base,i used small rectangular wooden blocks then attached 4" by2" leather straps these mounted where the blades went (it was a 4 blade fan) two of these are used opposite each other. forward and reverse plus three speed settings ,it works very well i will try to get a pic of it posted in action ,im also working on an auto puncher using a car electric door lock unit ,hi sharon when are you going to take a vaction and see me in san diego ?you work way to hard !!!