@rjessop:
I am not sure how being Kickstarter product complicates this.
@foxyscott:
For me the final fee is €14.28
I have made 19 payments of €4.46 and one payment of €2.73 (half a month?)
This means I have 4,5 payments (17,84+1.73=19,57) left.
So discount is like €5 for me.
On a less happy note: just discovered that I have a new crack on plastic cover which was repaired less than a year ago. I think I will go with sending for repairs.