It looks to me as if you really wanted to you could screw off the end and replace the spring.
I wanted it because the stock assembly doesn't have any tension any longer, it falls out when you put the slide back on.
The slide operation is definitely easier and I am glad to read about the operation also. I didn't intend recoil to change really as much as reliability.
Ill see if I can get a pic of the end I am talking about after work.
Although it might be funny to flip it out on the desk and do it here.