Rob has made these for several years for his students to use in his workshops.  Since featuring it on his Drawer Making dvd he has had several requests to offer them for sale. 

The body is Birch or Maple, the iron is 3/16 thick and 1/4 wide.  The iron fits closely in the mortise to minimize set up time.  Get the blade close, set the wedge hand tight, tap the blade to the desired setting and seat the wedge with a light tap.  Tapping the rear of the plane will release the wedge.  This plane is made to cut the 1/4" groove 3/8" up from the bottom and 1/4" deep.  Best of all, nice and quiet!