Thanks guys for your suggestions. With what you have added, I am leaning towards inserting a tight fitting rod through the bore and another into the quill, then compress them, try the cylinder on the frame and compress more until I get the cylinder free of the lower frame and the center pin to push the thumb latch back into firing position. I can use the center pin and lay the cylinder in the frame without the barrel assembly attached to see when I start to get a slight gap between the bottom frame and the cylinder. I note that the center pin seems to slide down the recoil shield perfectly centered as evidenced by the slight vertical line.

I am just too nervous to use the top strap as an anchor, since it might be possible to bend the upper frame with the small amount of steel at the transition between the top strap and the barrel.

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Gary
SWCA 2515