Hi all. I have a 2006 Astravan 1.7cdti mk4 shape and I’m looking at getting a new clutch. The issue I’m having is everywhere I look it says there is more than one available for my van. There is a 2 piece kit or a 3 piece, then one has 205mm diameter and the other 210mm. How do I know which I one I need? Does the 5mm diameter make a difference? If someone could clear this up it would be appreciated. Thanks