Don’t mean to get off track of this thread…..
Since the TC picture I’ve swapped the green for the higher rpm stiffer yellow spring on the driven gear. And changed the std to white springs on the driver. The latter is easy to do. The yellow spring not so. After some struggles, used a bench vise with a JS rod and key fixed vertically. Slid the inner plate onto the rod and key which locks any movement of the plate. Now, there are two moving parts instead of three. From there it’s pretty logical by first pressing the top plate part way down and then twisting against the spring to preload and finally pressing all the way down to expose the slot for the retaining clip.