Replacing the first of the rear brake cylinders, with the "usual" flailing around. Confirmed my suspicions that I didn't assemble the auto-adjuster with the correct spring orientation 3 years ago, so I'll be correcting that. The hard line was VERY difficult to get to start threading into the new cylinder, until I figured out that I needed to leave it (the cylinder) very loose until the fitting got started in. Making it harder the fitting doesn't spin free on the end of the brake line. Now that that is together, I just need to get the shoes put back on - it was getting dark and I couldn't see the square root of fuck-all, so I'll get that together tomorrow.