Uwe, these Pyramid flats are very nice. I've always found that Chromes and TI Flats require a week or so of playing to settle down, but these were sweet right out of the packet. The tension is obviously just right for the SG RI, the truss rod required not adjustment after putting the Pyramids on, and the action is nice and low and buzz free. Did I get lucky and managed to buy a Gibson that was not made on a Monday, Tuesday, Wednesday, Thursday or Friday, or has their QA improved recently? Or did they hire an entirely new workforce from Japan?
I'm happy you like them, I was a bit worried that they'd be too vintage for you, Chromes and Rotosound Jazz Flats have quite a bit more presence and Labellas and TI's are not as stiff and endear themselves more to the player at first touch.
The SG RIs are generally well-done, for whatever reason. But think of that blue one from Japan which is supposed to have neck angle issues. And I had to return a midnight blue Money bass a few years ago because the fretjob was horrid, making it unplayable not at some exotic high register note, but pretty much anywhere between the third and seventh fret!