These hold the cartridges very tightly, improving the reload process. The only downside is that they were so tight that I broke my demooner tool taking the cartridges out... but a little superglue and I am back in business.
Have installed the main spring and reduced trigger return spring and extended firing pin. Unfortunately the hand retention pin broke as I was putting trigger back together. Have ordered another hand. It would be helpful to have a video illustration of trigger assembly. Thank you. John Wong