Clutch quadrant/firewall adjuster? Benefit?

I really can't understand the difference between them either, JonJon. We have both the Steeda red quick release, steep ramp and the blue dual pickup quads, and I held them back to back, and the difference in the ramp is minimal. So the blue one is installed. I held similiar info about UPRs 3 pickup quad...someone had called UPR about which pickup to use and they said you could only use the last pickup. (well, what the hell are the other ones there for?)
The benefit of the aluminum quad is strength...that's about it.
The firewall adjuster will allow you to fine tune the slack between the firewall and the pedal...and thus will get rid of pedal vibe.
As far as aftermarket cables...yeah, I've heard all that too...and we have no problem with our Steeda adjustable cable. We been underneath it lately (6 months since the install) and it still looks as good as new at the clutch fork end. I've taken it apart, installed the new quad (the quad end is showing no wear either), screwed around with it as much as anyone, and given it some abuse with no issues to date. For those who have complained about Steeda adjustable cables, I really have to wonder if they were installed properly.
We threw the whole Steeda kit at it for full adjustability and we're very happy with it...now...finally.
Curious, where's your clutch's release point - same as before, higher, lower? After the KC install, the release point was sky high, and the pedal now rose an inch higher than before. Maximum Motorsport clutch pedal adjuster fixed that. It's all good now.
Best of Luck, JonJon.

JonJon, here is a link to Maximum Motorsports, and some testing they did with the cables, this might help explain a little bit. I, like twogts, have the Steeda cable and quadrant, etc. kit and I have no complaints.

Link to page at MM Click Here