jasonbourne71, OP
My suggestion for a cartridge upgrade. It has both wide channel separation and tight channel balance, which yields improved imaging. That TT has a removable headshell, having the upgrade cartridge pre-mounted in a headshell is an advantage.
https://www.audio-technica.com/en-us/cartridges/type/moving-magnet/vm540ml-h
It has an advanced stylus shape, Microline, info here
https://www.sound-smith.com/articles/stylus-shape-information
Yes, center weight, good idea
I use this one
https://www.audio-technica.com/en-us/at618a
btw, I don't work for Audio Technica, they just make well priced good stuff!