Happy Holidays,
You have a body that accepts a variety of stylus, and that means you do not need to re-align the cartridge body, a terrific advantage, if you do or especially if you do not have the skills or tools needed.
Amazing Results means the body is properly aligned, great news.
You may have worn your ML stylus out, so:
replace ML, try Shibata, or new cartridge needing alignment?
I doubt there will be much/any generally audible differences between new ML or New Shibata. Expected stylus life is slightly different, so cost difference tends to even out over time.
Going from Aluminum to Boron Cantilever should tighten things up, most evident to me in the low bass, stiffer cantilever’s progress in both ability and price.
After shattering a Shure Beryllium Cantilever, I stop at Boron.