I have done the install on an RB250 arm myself and even though it is slightly different from doing the RB300,I can say that you should not be scared of doing the rewire yourself.I was a little daunted at first but it went o.k.The hardest part is doing the soldering to the cartridge clips which is delicate but not too hard.I used a guitar string to pull the wires through(E 6th)which is perfect for the job,with the right tension.The wire is definitely a better quality than the Rega wire,which really flakes apart in your hands, and the added earth is necessary really.Hope this helps.
