If you haven't done so yet, when you go to set up the horizontal stab, they usually want you to line it up with a reference point on the fuselage. Don't use the wing as a reference since you know that it's off a little. Use the string method, only push a pin into the front of the fuse centered at the cowl and measure from there to the outer tip of each side of the stab. That way, the stab will be aligned to the fuse and not the slightly off wing.

Jesse