Non-Ford Clutch Questions

[Citroënbender]

One of my FWD cars, clutch is being replaced. Not a high HP monster. Tried asking on a specific forum for the brand, no bites.

I’m concerned that clamping force was a bit low as the disc is not worn to the rivets, yet clearly has been slipping.

The clutch housing sits on a stepped down area of the flywheel, it’s been replaced before. I’m wondering if last clutch job, they only machined the running surface and didn’t re-cut the step. This would reduce clamping force.

It’s a push clutch with concentric slave.

If the step was too small, the diaphragm fingers would push out more, I wondered if this explained the heavy wear to their tips and the very “dry” feeling release bearing from constant contact under light load.

From just the practical POV - ignoring brands, only looking at the symptoms as shown/described - what are peoples’ thoughts? This is the only hurdle to clear before I reattach the gearbox.