[ljguitar]

Hi cameronl...
Slight bulges on solid tops are to be expected. In addition, if the top is radiused, then the top has a curvature.

Take a straight edge and lay it across the lower bout near the bridge and see how high the edges are from the bottom of the straight edge on each side - when the gaps are equal you can tell how much radius combined with bulge there is.

All four of my guitars have a radiused top, so even if the tops look perfectly flat, there is still a gap at the edges between the guitar top and the straight edge.