I have seen the naca inlets quite often. to my best non-engineering knowledge, think this would be the better solution. there is probably a very fine line between a non or negative pressure in the fuse, vs. a positive pressure in the fuse, which i would imagine to be bad, very bad.

edit> i agree with matt in that there are only a handful of builders who could get the fit and finish of all the potential openings sealed tight enough to cause problems.