Just received a ES-1GT and had a quick look over it and noticed the neck tongue is not level. On the far side it's not as bad like it's been cut on a angle across the tongue. Don't know whether to sand it down level but I'm thinking if I do will the bridge be able to go low enough to get the action right. Suppose check it in the day light by clamping the front of the tongue down. Only thing is it's not going to clamp down evenly along the tongue to get a true gauge of what's going on.
In the photo from above you can see tell tale pattern on the timber showing how it's cut.