sonett - new clutch master and slave
The clutch was working poorly, then it got worse. Pushing in the clutch pedal had some effect but not enough. The clutch dragged badly. In 1st gear, the car would still move foward at 1 mph. This made changing gears impossible.
I believe this was also related to the shuddering I experienced while shifting gears.
I opted to replace the entire clutch hydraulic system. I got parts from Skandix and installed them. To make my life easier, I installed a new banjo bolt on the brake master cylinder. The new one was much shorter than the old one (that included the brake light switch) which allowed me to remove the clutch master without removing the brake master first.