it also has a little added string tension, allowing for lower action and requiring a full 5 springs on the trem (I had 4 previously with my normal .011s). this makes the trem stiffer, while still being balanced in either direction. so it's much more subtle and useful.
also, it's hard to see in my shitty pic here, but check out these stubby height adjustment screws I got. no more shit stabbing you in the hand!
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