gn69...when I realized that the spring was "cut that way" and only that way (with the delivery of the 2nd spring, which was EXACTLY like the first), I tried again by loading the Safety Catch Plunger and Extractor Spring into the "tube" on the gun where they are supposed to be and just "pressed the heck out of" the Extractor Plunger into the spring using the Extractor (with a gloved hand). The Plunger snapped into place in the end of the spring. At the snap, I first I thought I busted something and was pleasantly surprised when the Extractor Plunger was tightly held in the spring.
When the Extractor was used to longitudinally depress the spring (hoping to hit the mark where its round "post" meets and matches the round "hole" in the frame) it bound up in a cockeyed position (maybe the Plunger was rotated?). So I turned the slide over and held the firing pin and spring back with a pointed ice pick-like screwdriver using one hand and half-rotated the decocker (all of this inside the plastic bag) used a needle nosed pliers to ease the decocker completely out of it housing. The Safety Catch Plunger, Extractor Spring and tightly held Extractor Plunger shot out into the bag as the decocker came out. No parts or pieces lost. I had to do this multiple times before I got the Extractor to seat correctly.
Once seated, everything was taken to the range and fired. All is well that ends well.
So far, with the recall and service of both of my PPK 380's, I have found S&W warranty service, even that portion that I buggered up, to be STERLING and WITHOUT REPROACH.
I am glad that this Forum of Gunsmithing includes pistols too! There is so much subtle interaction with these precision machined parts that to use brute force and frustration is JUST WRONG when a well worded question or two will ordinarily unwind the mystery. It takes a few day or week sometimes, but waiting patiently means the difference between losing parts to "explosive disassembly", bent and destroyed parts, or completely ruined guns. "Tying a barrel in knots" is sometimes the comic strip depiction of that frustration. I should know, I have been there and tried to do that a time or two.