Ya that set of 123 blocks were getting a little dog eared so I put them to better use.
The contraption is just a simple router sled. I use it mainly to flatten warped boards. Clamp a board in there and knock off the high spots with the router and you have one flat side to run through the planer. I have a small sawmill so I use it fairly often. Crotch cherry gets squirrley for instance. I use small pieces of that for my shaker boxes. I figured it would help get rid of the excess wood on the stocks. Works good and saves my arthritic hands. Dan