I changed mine to the new-style mainspring assembly and it made a huge difference. I use the stock hammer spring.
Either one should work, but you must also get the mainspring, as your current one will be too long. What bblr initially meant, was that you didn't need to go to a lower weight aftermarket spring, for smoother function.Which model new strut assembly am I looking for, P225?
Will I need to make modifications to any other parts when I make the switch?