only problem with the SSG is it's ability to be externally adjusted and so like a power adjuster is capable of setting power over the limit in both pistol and rifle
I made one and found it worked very well but it also made it easy to up the power all be it without the efficiency
if you want to increase shot count look at fitting the 2300s valve stem and volume reducer and use the hammer spring and adjuster
light hammer and stiffer hammer spring work well at reducing hammer bounce I either machine a std one down or use the front part and fit an ally rear if using a drop sear trigger