+ 1, SkiBumBrian!
Porting with the use of a flow bench quantifies, measures the improvement in flow obtained from the process.
I, too, would have more confidence in a porting job backed up by data from flow bench runs, than from one "ad-libbed" by a shade-tree mechanic with no instrumentation, no matter how grandiose his unverified, untested claims of proficiency.
That said, it's still Rustydust's bike, and he's the only one to be satisfied with how his head is ported. I share my preference for a flow bench, and my reasons; his choice and the reasons for it may be entirely different, but remain just as valid.