Jumper wires & RFI in preamp

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I’m thinking to simplify by bypassing my preamp’s balance and tape/source controls. If the jumper wire on the PCB is a bit long, rather than a two loose runs I could twist the L & R wires in order to gain more resistance to RFI, or even run each signal twisted with its own ground jumper merely for RFI resistance. Or am I over-thinking this?

(I’ve noted that most of the hookup wire in the preamp is double (signal/ground) and with the amp most is single run, which of course makes sense in that most of the preamp runs are related to an input or output socket.)
 
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