I'm waiting on 9mm for X7... selling MFT 7.5mm casually. I don't recall thread, but I understand the 9mm on X7 to be much more functional or easier to get functional. I haven't invested in 9mm yet simply due to Winter period and no pressing needs. It'll be a Spring/Summer purchase.I am interested in the procedure as well, did you find out? I have both the X5s with 7 mm and the X7, waiting for the 9 mm. cheers