I had a SG Boogie System, including 1 piece firing pin, Hammer Coil Spring System including Jeweled SS Hammer, & Lever & Carrier Arm Springs & Screws installed on my .357 Cimarron '73. Very Smooth. But, it bothered me that this rifle was different than my other 3, & I didn't like the fact that I couldn't quickly remove the bolt if I wanted to during a match. This shouldn't bother me because I always have a backup close at hand.
Lever & Carrier Arm Springs & screws are $39 on SGB website.
Hammer Coil Spring System including SS Hammer is $279 on the website, & is SOLD OUT.
I couldn't find the 1 piece firing pin setup on the website, but it was expensive.
These parts will need to be installed by someone who is very familiar & competent with the setup, or who intends for it to be installed by a competent gunsmith.
But, if you want a several hundred dollar setup for a huge discount, I'm your guy.
Give me $250 for everything. See the pics. I'll have it with me at Tenn State & if not sold, at the Southeast Regional. Or, I guess I would send it to you for an additional $10.