Panoramic roof light blind

Can those of you who have, like us, this pointless wonderful feature tell me if your blind fits flush with the top of unit when closed? The reason I ask is, after 8 years of use, the huge (1/2 cm) gap ours leaves and the light that leaks in the morning, is really annoying me.

Ps, yes I've tried to fix it and I can resolve the problem with a strip of foam draught excluder .

Do you mean the roof light above the cab?  If so, ours didn't shut properly when we bought the van.  The dealer had to remove it to adjust the strings and it's been OK since.   If it's the same as ours, the blind is held in place with 6 screws.  To access the screw the tiny plastic centre part has to be removed which is fiddly to do.

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Thanks Caraman, After a quick look, I've decided that anything technical to do with blinds is way above my pay grade. I did wonder if there was something missing from ours causing the gap but a short piece of draught excluder will be my fix.