Question:  Is it possible to pull the engine unit from a servo equipped Mini without disturbing the hydraulics?

Answer: The answer is YES!   In this short video taken just before I re-installed the engine in our last project, we can see how the servo unit is pulled up and tilted backwards with just a slight twist of the two brake pipes that connect it back to the three way junction on the bulkhead.  I show a little trick for tightening up a small brake fluid leak…. finesse instead of brute force!