Mike's advice is probably sound, and is exactly what I had intended to do, however . . .
J (3n003) was kind enough to help me out with a trigger problem I had with my R9GF. He also had a brand new R9 and took it apart to figure out how to help me fix mine! (What a great guy!) In the process, I had the opportunity to see J work on his brand new R9, replace a factory piston seal (which was severely scored and causing some dieseling), swap out the original spring for a Maccari spring, guide and tune kit, and properly lube the R9. This, mind you, was not a custom tune.
Then, when i shot and compared my brand new R9GF with J's lube tuned R9 with the new Maccari spring, guide and seal, well. . .
Let's just say I immediately invested in J's time and talent, and Jim Maccari's excellent spring, tune kit and lubes.
My R9GF and I are both much happier for having done so. Thanks J! Thanks Jim!