I need some opinions please. I just put a set of LaBella Deep Talkin stainless flatwounds on my Modulus Flea 5. They sound GREAT, except for the D-string. The other strings sound deep, round, and warm. But the D-string sounds twangy and if you let it ring, the sound wavers or oscillates, as if somehow 2 different notes were being struck at the same time. Anyone ever encounter this before? I did check the guage of the string with a micometer, and it was correct, and visually the string appears to be normal. I never had this issue with all the other different sets of strings that I've used. This is my first set of LaBella's. Could I have a bum string? Thoughts?