Hi Guys, I was going to do a brake bleed on my 348, when I realized that the hex size on the bleed valves are BETWEEN 9mm and 10mm. Are the valves Imperial instead of Metric? If it is indeed 3/8", then I'll have to go out to buy the right size. Everything is mostly Metric over here... Would be great if someone could help me confirm the hex size of the valves. Mine could even have been changed! Thanks!