Hi there,

Are you still looking for a Quarq Dfour power meter? I had a bike fit two weeks ago and as a result I changed my power meter (crank arm was too long).
I have a 172.5mm Quarq Dfour GXP with Shimano Durace Chainrings both in 55/42 and 53/39. I know you're looking for a BB30 spindle, but if you would like to get more information and photos, I'd be happy to answer Qs and send photos in PM. The power meter works without any issues at all. It is from July 2018.

Best,
Kevin