Oh golly!
I said if it’s powered and that included by hand.
Micro mark’s has a lower roller the one with the crank, I was thinking that if the center upper were cranked you could omit the gears if it was home made.
But unfortunately I didn’t specify what fricken power youse guys would use on a 4" square tool.(http://www.largescalecentral.com/externals/tinymce/plugins/emoticons/img/smiley-wink.gif)
I like to look at tools and see If I can get close on the cheap. I could assemble rods and sheet framing … but the main and idler gears not so much. No sweat to pin on a handle… I have tap and dies for the adjusting screws …
OK take it away!