help hot-wiring RB300

Hi. I've been wanting to rewire the arm on my Rega P3 because the left channel doesn't work. But there are some questions I have before I buy the parts.

http://www.hi-fi.com/diy/rega/parts.html

1. The parts list say "Discovery tonearm wire, 28 awg. Red, Green, Blue, White and Clear." That's five colors. But in the instructions there are only four colors. What's the clear one doing there?

2. Two feet of each color seems more than enough. (I'll take my chances fishing it through.) But what if I run the wires directly to the amplifier? (My Rega Brio already has a built-in photo stage.) I can buy five feet of each color and braid them from the bottom of the turntable, and I'd still have three feet as the lead wire, would it sound better than using the Van den Hul d502?

3. If I tear the existing ground wire, what kind should I use to replace it? It's not in the parts list. (Or is the clear tonearm wire used as the ground wire? I haven't purchased anything yet, but it doesn't look like I can fan it open.)

4. pcX doesn't have Van den Hul cartridge clips, or anything else by vdh, but they have Cardas cartridge clips, stamped gold plated brass (set of 4) $3.95. Is that going to make a difference?

5. http://www.rega.co.uk/downloads/BrioManual.pdf
On page six there is the ground screw. What kind of spade lug should I get for the ground connection?

Answers on any of the questions would be helpful.

TIA,
Daniel