Well for those unfamiliar with shingle mills, I will try and explain the workings of it.
In Brendans top picture, you can see the carriage. This is the thing with the teeth top and bottom. You stick the "bolt" of wood between the teeth, by stepping on a board on the floor that opens the jaws. The carriage moves behind the sawblade and back. Each time it does this, the bolt is adjusted outward automatically. One time it is just the top. Next time it is the top and bottom. This keeps the shingles cut at a taper. Thicker on bottom. Then the shingles get grabbed out of the catch box below the saw, and turning to the right get edged on the edger.
This is a very interesting mill, and will be great to have in operation.