I found a nice Optimus 111 T. It is a new thing for me. I only changed the NRV and it appears to me that it works fine. My concern is to see that the multitool key is not in the axis of the valve as you can see on the photo. I found another rod with a leather cup instead of the rod with a O-ring. Yannick
@kerophile Thank you for the link. This problem seems not rare ! I’m afraid to try to bend the brass tube… May be the other kind of key could be the solution. Yannick