Cleaning-up the Rib Structure

Now that the rib structure has been removed from the mold, there are several steps that are necessary to clean it up.  First, the corner blocks are trimmed with a chisel:

Then, a scraper is used to clean-up the inside surface of the ribs:

Before the lower block is trimmed, a hole is drilled for the end pin:

Then, the upper and lower blocks are trimmed with a gouge:

Finally, a knife is used to trim the linings:

Here is the completed rib structure and back plate: