Turntable and mixer: two questions

[Boogie Boy]

but I've also been told that it's not possible to get inside the arm to fix it....anyone know definately what the answer is?

It is certainly possible to get inside a Technics 1210 tonearm - if you gently click your finger nail against the tonearm it will give you a clue as to the fact it is hollow and hugely resonant, thereby allowing you to rewire the deck should you so wish.

BB