The Sheet Metal Brake

Dave sure loves to use sheet metal. Can't say I know of anyone who has made this machine. Here it is anyway, for completeness. (*1)
parts list and final assembly gallery ?
explanations and corrections to the book
improvements and modifications to gingery design
other designs ?
construction techniques ?
usage techniques ?
safety ?
explanations and corrections to the book
improvements and modifications to gingery design
other designs ?
construction techniques ?
usage techniques ?
safety ?
Some other designs are listed below.