Again, an old one. I've tried to keep it completely original (except pivot and 2 washers, lost...).
Horn scales, bone (I think...) wedge.
No electric tool, only hand.
before
http://img526.imageshack.us/img526/605/44723166.jpg
after
http://img18.imageshack.us/img18/7280/31961348.jpg
http://img143.imageshack.us/img143/9235/31832114.jpg
http://img6.imageshack.us/img6/7624/37435421.jpg
http://img14.imageshack.us/img14/5994/17328607.jpg
http://img689.imageshack.us/img689/2253/87067132.jpg