I agree with this viewpoint, in general. As for "phasing issues," I posted a calculation a while back showing that, considering the velocity of vibration through wood and the relevant frequencies, the small separation between pickup elements as would be the case for the Yamahiko, would not be expected to produce destructive interference of any practical consequence. That aside, I think "if it ain't broke, don't fix it" applies. Even if Thumpie perceives there to be drawbacks to the FC, then it's not clear that the Yamahiko will provide a substantial improvement. In order to find out seems to require substantial expense and modification.
One drawback of the FC and the Yamahiko that I see is shared by many other pickup systems. That is the inflexibility in terms of positioning. While many might perceive the "uncertainty" of the Ehrlund's response in terms of where it is located as a drawback, I see it as a benefit. The enormous flexibility it offers in terms of positioning and the character of its response on specific basses makes it all the more likely that one can achieve a satisfactory (and, in my case, wonderful) result. One just has to be willing to put in the time.
As always, it's for Thumpie and any other player to decide. All we can do is give our opinions from the peanut gallery.
