To get the clutch return springs and piston out you need to find a way of compressing the return springs so that the retaining housing can be moved out of the way of a retaining clip ring.
To do this I just grabbed a bit of 2" X 1" soft wood and made a little bridge structure.
As you can see it is the super duper deluxe version with two screws per foot. Hi-tec solutions rule.
Push the retaining clip up and out of the way
(You can see the clip just under the clip in the picture above)
It dings up this far!