Golly, thanks for the obit, RC, but it is a bit premature. I have fixed a fair number of those, though it isn't easy and they are tricky as hell. I have three that operate perfectly, and one I have in parts, trying to find a hammer.
James Weaver, you probably have the sear in wrong relative to the sear spring. The sear spring is the inner (longer) curved arm of that magic "everything" spring. The outer shorter curved arm operates the cylinder stop and the inner arm operates the sear. The flat side goes to the rear and butts against the frame.
To install properly, insert the cylinder stop first. Then insert the spring part way, making sure the shorter arm is in position to operate the cylinder stop. Now insert the sear forward of the inner arm of the spring with the arm of the sear lying alongside (inside) the cylinder stop arm, and insert the sear screw. Now push the spring in to fully seat it, making sure it operates both the cylinder stop and the sear.
In operation, the trigger cam operates both the cylinder stop and the sear. It first cams the cylinder stop upward to release the cylinder, then as the trigger comes back more it releases the cylinder stop and begins to cam the sear arm down to move the sear out of engagement with the hammer.
Jim
