How to replace the clutch slave cylinder NA (MKI) & NB (MKII)

A leaking clutch release cylinder results in poor clutch pedal feel, poor gear selection & in the end being unable to select gears. Here's how to fit a new release cylinder from MX-5 Parts to this 1991 MX-5 (the procedure is the same on NB). Access to the cylinder from underneath will be restricted by under covers on later cars, especially the facelift NB Sport.