According to Glenn
When I have asked about this in the past, the folks at PPS said they offer this upgrade because people have asked for it, that's the only reason. It does not improve performance but it does decrease gas-efficiency. The gun was designed to operate with out ball breaks at the most gas-efficient pressures, which it does beautifully.
Palmer Blazer, Black
I find it curious that most people are more interested in opinions than facts.