OK!
I’ve made some progress.
I drilled the carbon rod to be able to remove the little rod inside the pulley.
I’ve made a little hole on the other side
That way I can insert something to push it out
I’ve then been able to remove the pulleys and the two graphite nylon gaskets
It’s very difficult to put them back, and the gaskets are really fragile (I broke two…)
But I’ve been able to install one pulley (without any warranty that the two gaskets are correctly in place)
I’ve ordered a few gaskets (ID:5mm/OD:7mm/0.3mm), can’t continue the modd until I receive them.