Denon 103r ????

I have made some improvement to my 103r, but am still getting tonal imbalance with this cartridge.
It's too bright and edgy on some recordings!
At times it sounds incredible, excellent imaging and sound stage.
What do I do though to tame down the brightness. Change the tracking force a bit or tracking angle, change the loading, impedence or capacitance. Add more tonearm bearing fluid or remove?