Sorry for the recent lack of news. We were busy: after all the stress tests, the secondary mirror gave signs of cracking. We had to expertise it, and understand where it was coming from.
Conclusion, we have now a brand new coating: Silver (we are rich). Thanks to Optics Fichou for saving us!
Here is new version of M2, next to the old. Next task is the integration of the telescope into the flight model.
By the way, we have a cool new picture of the satellite (the payload is not yet inside):