Wow! Just got the BMC Team Machine SLR01 with mechanical dura ace and its truly stunning! Except for the dura ace mechanical gears, I wished I'd gone electronic considering how good the frame is, it's a shame not to put the very best components on it. I suppose I've been a bit spoilt coming from ultegra di2 getting used to that doing all the work, but this mechanical gearing is so scrapey and difficult to operate, really quite loud drivetrain noise as well, had this explained in the shop and shown the Teflon type plate thing in the inside of the derailier cage which is designed to scrape the chain on the 3 granny type gears.
Really happy with the semi compact gearing 52/36, heard of other people complaining about the new dura ace mechanical being noisy and trying various things, changing cassette, all kinds of different lubes to reduce noise. I'm sure it'll get tweaked and sorted out eventually but it's VERY rough sounding