Well my RB300 upgrade is complete. I must say, the detail is outstanding!! Not sure if it's the cables or the TechnoWeight that makes the difference but I can hear clarity that I've never heard before. Might just put the old counterweight back on and audition the cables on their own. Probably not though since I'm comfortable with the setup.
One small thing is missing though, the upper high-frequency energy seems to be washing out (ie. crashing cymbals). Could this be a sign that the cartridge is in need of retipping? If the edges of the stylus are worn out, it would make sense that they're not making contact with the top of the record groove.