I thought that this commercial 'Boni' one was a neat and relatively simple rigid design that I might copy when the 'roundtuits' overflow.
The separation of the two arms is set by a left and right hand screw adjuster which is an off the shelf item, and the centre height is set by sliding them up and down the grooves. It's certainly the simplest 'stiff' one I've found so far
Andrew
The separation of the two arms is set by a left and right hand screw adjuster which is an off the shelf item, and the centre height is set by sliding them up and down the grooves. It's certainly the simplest 'stiff' one I've found so far
Andrew
Andrew Mawson, proud to be a member of MetalworkingFun Forum since Oct 2013.