Not at all, IMO it would take a HEAVY putter to cause any sort of fatigue on the greens, but I suppose everyone is different. Its the beauty of balancing/counterbalancing, though the overall weight is higher, it in no way feels like it when in use in the stroke.
Interesting. The PCB does look like a very attractive putter. I know you're a Super Stroke user. Do you think that a taperless grip would be even easier to use with the design?