Quote Originally Posted by travascus View Post

Keeping an eye on the metric / imperial fasteners will definitely drive me nuts (see what I did there ;-) — it's definitely on my mind.
Post a pic of the brake MC, that will tell if your metal lines are metric threaded gland nuts or not.

I have a vague recollection that all the RRC callipers have a metric thread for the brake hose at the lower end, but the upper end of the hoses can be metric or imperial because there is a difference in parts catalogues for metric or imperial brake hoses.

You need to get professional advice with this.

cheers, DL