Finally decided to pull the plug and abandon a tandem build.
New Quarq DZero Carbon Powermeters 170mm, 30mm (not DUB) spindle, 110 5 bolt BCD, one sold but one remains available, $350Matrix Carbon/Aluminum 56/50 tandem frameset. Frameset was partially built but never ridden. Headset and BB eccentric were installed, while all of the parts in the final photo (cranksets, seatposts, stoker stem, dummy brake hoods, and 24mm BBs) are new/never installed. Arundel carbon bottle cages, Zipp stem, and Rotor BSA30 BBs are included (I was going to run the tandem with dual 30mm cranks). Frame and fork accept both rim and disc brakes - you can run whichever you prefer. Standard 100mm front/130mm road spacing with quick release (QR) dropouts. $800All prices include shipping in CONUS, except for the tandem frameset. That one is local pickup or you provide the shipping label (e.g. Bikeflights).