As we know, summer activity has a way of interrupting a build. In my case is was a good thing. I had completed, some time ago,the installation of the brake MCs and reservoirs and bled the system with success. After several weeks away from the project, I thought it was time to jump back in. Instead of using the red all- purpose hoses provided by FFR to connect the reservoirs to the MCs, I thought it would look cleaner if I used some black fuel line hose. I discovered this morning that the brake fluid appears to be sweating its way out along the entire length of the hoses. What a mess. Was using fuel line a mistake?