In a situation similar to yours, e-man, I hedged my bets by making the shorter wire about two-thirds the length of the longer one. That's quite a bit longer than I needed, but I didn't want to have the difference between the two be too large. (It also leaves me with a length that's not too short to sell, if I wanted to.) I loosely gathered the excess into a sort of figure-eight shaped bow. Someone smarter than me said this would be better than a coil-- maybe Bear can comment. I don't know if I've come out ahead in terms of sound quality or not, but over extended listening I have not noticed any imbalance or deleterious effect. If I chose to approach this like a hobbyist and experimented and investigated, I might or might not discover some subtle differences, but it's easy for me to leave this alone.
