Bubba oink cut a coil off the rebound slide spring on my model 60 some 30+ years ago. It did improve the trigger. It worked fine for many years but as the spring weakened with age the trigger return got sluggish as described. I ordered a new spring but meanwhile and as I had the gun apart, I cut a very small piece out of an appropriately sized SS pop rivet and added it to the spring. Works great. I'll put the replacement spring in next time I pull the side plate off, if I can still find it, but it works just fine as is. Bubba wins again.