04-09-2015, 08:15 AM
no, there is nothing holding the main spool in place, other than the back plate. The part you see, is the spline the spool sits on. The old one simply slides off, (will need some sort of persuasion with a screwdriver lever) and the new one does simply slide back on 
Not always Grumpy!!
306 Cabby SE, 2.0l 16v
To the optimist, the glass is half full. To the pessimist, the glass is half empty. To the engineer, the glass is twice as big as it needs to be!