Well heck Roy
And here I was ready to explain the how too's to replace your Han Spring. Also to suggest and explain you should skip replacing the flat spring and just convert to Coli Spring and Plunger, alia Ruger. Once converted to CS & P, it's a "Forever" fix.
However, I'm gonna disagree wid ya. The hole, spring and plunger should NOT be centered on the Grip Frame screw hole. It should be centered to the Hand. Centered over the screw hole and you have asymmetrical pressure on the hand. It "may" drag. Normally the Hole and S&P should be off set to the frame side. Centered on the Hand. AS long as it works however, you're good.