Had good experience with Prox as well. Responsive and we're able to adjust my order quickly due to a mess up at my end. Very nice carbon, and have held up for a heavy bloke like me for 1000km

That said I ordered rims only, so can't speak to their hubs or wheelbuilding.

Great to hear. Pity about the cable - should be an easy fix right?

Is the rear mech cage removable on the Er9? Can it be swapped out?

I've been following this closely for an upcoming build. In Australia it's not so clear cut: Ali has the ltwoo erx (effectively and upgrade kit) for like 1100aud (shipped with gst). Best local retailer (bikebug) has rival at 2k+ (for upgrade bits and pieces) and 105 as not much better. Looking at our prices - maybe I'm wrong - but I think we're getting ltwoo a little cheaper, but sram/shim much much more expensive.

That all being said, there's a reputable seeming seller on Ali able to ship a 105 di2 full set for 1400ish, which is a fair bargain.

I am waiting to see what prices look like for the er9.