I had the most upper-most extrusion tube separate on my 2000 H340 with a Furlex 200S. I was able to have the yard go up in a cherry picker and snap them back together. Turns out that if you raise the jib without first attaching the tack of the sail to the furling drum, it allows the top of the jib and upper furler swivel to pull on the extrusions, separating them. I have been lucky to not have it happen again. Furlex does sell a replacement Connecting Plate # 539-561 and a Furlex extrusion repair kit with 2.5 meter extrusion, turning tube, distance tube and connecting plate, but you are right to assume that you will have to replace or adjust the forestay as part of the repair.