I have a couple of Quarq DZero power meters for sale. None of that hidden bolt nonsense. These are the non-hidden bolt version, LOTS of options for chainrings

1- 170mm Red cranks, 130 bolt circle. The cranks have about 250 miles on ‘em, the PM spider is brand new, ridden just enough to make sure it works. No rings, no BB. $750
2- 170mm ‘Quarq’ carbon fiber cranks (Red level cranks), also 130 bolt circle. Less than a 1000 miles, used on TT bike only. No rings, no BB. $700.
3- 165mm Quarq carbon fiber cranks, 130 bolt circle. Less than 200 miles, TT bike only $750

All 3 cranks have GXP spindles. Shipping in the US is included. Detailed pix available on request. Open to reasonable offers