Tonight I'm going to revert it to coil shunt. The parallel mode is bright to the point of being shrill. My guess is that because the pickup has a good amount low mids, those frequencies get canceled, leaving it all top end. Oddly enough, I also found that the middle position sounds almost exactly the same whether in series or parallel. Coil shunting provides two more distinct tones. I suppose it stands to reason because a Lace Dually is closer to two single coils together than a typical humbucker is.