I don't know about yours but I am posting
the Furlex 100 pics below in case yours is similar.
The assembly consists of a spacer that fits in the foil sections, bridging two foil sections. There are U shaped pins that go inside. It is a bit of a jigsaw puzzle in that they have to go in in sequence IIRC. I did mine a couple of years ago after a drum failure and forestay change.
Look for little pinholes on the leading edge to discover if your foil is assembled like this with little lock springs. I think there was some magic trick to get teh first one out and the first section off.
If the complete Furlex procedure would be helpful send me a PM with your email
address and I will send it to you.