The hardest part of working on a Centennial is holding the hammer back far enough to put the "pin" (paperclip) in the hammer strut to keep the mainspring compressed. I made a small piece of wood to just fit in the gap caused when the hammer is close to full draw, and slip it in between the hammer face and the firing pin. Let the pressure off and just lift the entire hammer strut & spring assembly out.

One thing I noticed when I recently did a trigger job on my 432PD (same frame and finish), was the rebound slide (as well as most all the interior parts) had the same finish, a matte black. This isn't conducive to a smooth trigger, so I did some polish work with a stone and used an appropriate grease on the bottom and both sides of the rebound slide. Made a good difference.

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H Richard
SWCA1967 SWHF244