Valve seat cutter: total waste of money?

[kd]

  It's been discussed here on our interweb and CFM tested. The most important part is with a carb. The fuel comes out of suspension and sticks (pools) to the port walls.  As far as better flow, the common description that is compared to is golf ball dimples.  Aerodynamically, they make the golf ball fly further due to reduced friction.  Some porters will intentionally dimple or rough the ports where it matters most. Exhaust ports, not so much.

[Buglet]

  The last set of Shovelheads I received from S&S one guild was installed half way down the hole, I guess it was break time. So much for QC.