Wire gauge.

14 gauge Neotech UP-OCC solid copper in Teflon from Parts Connection. Runs about $7 per foot. I’ve used it on speakers and inside amps.

If you’re already inside it, and evidently not fearful of wielding a soldering iron, you could fully experiment with different gauges, materials and geometry.

You could drop gauge size for tweeters for example and a bit of trial and see what you like best?

I personally have copper ribbon, probably about 16AWG for speaker wires, I have photos in my system page. There can be distinct to often subtle differences in sounds produced by different materials in that part of the circuit, have fun.

You didn't ask about this though, I like Cardas Soldering Wire Quad Eutectic Silver Solder. Maybe you might like it too?

I even put Bybee bullets in between the crossovers and the driver terminals.

Thanks for your suggestions. I was bouncing around OCC silver. 18g-tweeter, 16/14g for mid driver & 12g OCC copper for the base. My crossovers are exposed & so are the drivers, so no need to solder. I was also curious about the gauge, if that would make a difference?