I don't want to start another raging debate about cable lengths (but I guess it probably will
) but....
If one chooses to have equal length cables how is the best way to "lose" the excess?
Should it be neatly coiled up, with a potential inductance effect, or simply left in a (hidden) untidy heap? I want to have enough spare to allow for a room re-furnishing and we're probably talking 12m per length total

If one chooses to have equal length cables how is the best way to "lose" the excess?
Should it be neatly coiled up, with a potential inductance effect, or simply left in a (hidden) untidy heap? I want to have enough spare to allow for a room re-furnishing and we're probably talking 12m per length total