I've had more than enough of the break in period and I finally found my string. Sounds great on my vintage jazz, mids and bass and sounds just like old recordings (which I surmise are Fender strings originals).
Thanks ghs
sadly with the winter in full effect I have my truss rod maxed and the tension is just too high. I'm getting pangs in my left arm (fretting) when playing for 30 or more minutes, not good. gonna jump back down to a roundcore flat as they are more flexible, easier to fret, and less tension. I'm using 45 60 80 105, so jumping down to the .75 and 95 won't make enough of a difference for me.
GHS please make your Precision flats in a roundcore series
I hope he replaced them with GHS Precision Flats 