Any tweaks for Athena ASF-2's?

I remember hearing here and there that the Athena's responded well to some cheap tweaks. What are they? Replacing those el cheapo plastic cones with some brass ones is a no brainer. What else?
a quick one might be to tighten the drivers ( to the front baffle) with an allen wrench or whatever it takes, be careful not to overtighten or strip. This might improve the solidity and definition of the bass. I usually do it for the bass-mid drivers, havent noticed much for hf drivers, but try it out. Its quick and free.