When I swapped out my BB loose bearings for a sealed cartridge, I ran into a problem with the front derailleur not pushing the chain out far enough to climb the tall gear. I ended up having to shim out the derailleur to make it work. After that, everything else fell into place chainwise. I went with a 117mm spindle when the Parker chart was recommending a 122mm. I never would have been able to make the 122mm work because it would have pushed the gears out even farther away from the frame. But if it's working good like you said, why fix what ain't broken?