I just recently replaced stock bearings and bushings in a new Calcutta CT300D, 4 handle bushings with 4 bearings, 5 internal bearings (spool bearing replaced stock bushing). Unfortunately, I can't tell you if it was better because, after I reassembled the reel, the spool clutch no longer was functional and the spool/gearing was noisy. After many attempts taking apart and reassembling with no change in performance, I went ahead and sent the reel off to a reel repair shop in Interlochen, MI. I asked them to detail what I did wrong so that I would not repeat error on the next maintenance cycle.
I guess the moral to this story is "If it ain't broke, don't fix it!"