I bought an LS-15 about 2 years ago and had GNSC rebuild it. All I can say is that I didn't like it, stock, and was quite surprised with how much difference Steve Huntley's mods made. Steve is very serious about building the sound from the bottom up. It didn't have a very satisfactory bottom end stock, and when Steve got through with it, it did.
I don't know if this helps, but if you want to know more, feel free to email me off-line.
I don't know if this helps, but if you want to know more, feel free to email me off-line.