Brass Ball for Ploopy Adept Trackball

Here's me trying a heavy (8.35 grams/cubic cm) yellow brass ball in the Ploopy Adept Trackball. TL;DR is don't do it - it's too heavy and also doesn't track well due to reflectivity issues.

It looks awesome, feels hefty and weight in hand is delicious though. I'm going to try sanding it rough to scour out the reflectivity some and see if it improves the tracking skipping issues.

My initial hypothesis for trying this was that since a hefty (nearly 1 lb) brass ball would weigh down the trackball and the roller bearings, it might lend it a solidity, stability, and increase accuracy and precision of cursor movements for delicate tasks like drawing, marking, editing. Also since brass is softer than the steel of the steel roller bearings, I thought it would be less likely to mar, damage, indent the steel bearings over time. Also since brass is 66% copper, I felt it would have the antibacterial, anti-microbial effect that copper allows - a nice hygienic feature to a frequently touched item.

***UPDATE: I scuffed up the ball severely with a 60grit, then 220grit sandpaper - the ball surface is now VERY roughened and marred-looking throughout. IT TRACKS PERFECTLY, ACCURATELY, PRECISELY. Downside: there is a significant GRATING SOUND as I use the trackball as the roughened texture is scraping against the steel roller bearings now. There is also more resistance to rolling the ball from the roughened texture. Overall it was a "need to do" thing to the reflective brass ball to allow it to track, but w/significant downsides.***