@Robert Wagner Hi Robert, Good question about the BB. In the first round on picking the crankset I’d gotten a high end CeramicSpeed BB for the T47/GXP. When it became clear that the GXP crank would not work and I pivoted to SRAM DUB I decided to just get the basic BB for the purposes of determining if DUB would work. That said, I will at some point upgrade the BB to a fancier ceramic bearing one. As for the Osymetric chainrings, I know they are funky looking but I’ve been using them for years. I still think they offer performance advantages. They did win a few Tour de France’s not so long ago after all!!