The Hammer Hanging Jig fits on the Squaring Platform raised high enough for its sliding top to just clear the backchecks at rest (of course, shanks will be up and keys not at rest as you work so just make it high enough to not jam backchecks). Travel shanks to vertical with the sliding top retracted behind backchecks. Then extend the sliding top and adjust its rail to lift hammers by their shanks to strike (provided by the Regulating Rack). Then, add the Hammer Hanging Jig onto the sliding top and hang end-of-section hammers to original samples. Use the Hammer Square Lite to make sure they're vertical. Now, remove old hammers and add in new shanks (or clean up ends of old shanks) and set shoulder guide to rear shoulders of newly hung samples with the sliding top's rail positioned as a tail stop. Add glue to the next shank, spin on hammer, pressing rear shoulder to shoulder stop and inside of tail to tail stop, checking verticality with Hammer Square Lite (squaring can be touched up later with the Hammer Square Articulated after removing the jig). When the section is complete, loosen thumbnuts and move sliding top with Hammer Hanging Jig to the next section. There, repeat the pattern and move on to the next section until you're done.