Hi Joe Hi, Consider also that strings of a unison are already coupled by the bridge pins agraffe etc. I dont think its the bridge pins that couple the strings, its the bridge itself that allows this interaction. In this context the pins just convey the strings energy to the bridge which is the connecting factor. The front termination will of course also allow for some coupling to take place since neither these can be infinitely stiff. Which is why in my original post my <<hypothetically infinitely stiff supports>> included both front and rear terminations. RicB
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