I can't say for sure but it looks like all of the sunroof components were removed for the CF job then the CF filler piece was just screwed in with the latches. I can say with almost certainty that the glass does not weigh 26lbs by itself and the motor to operate it weighs only a few lbs at best so I would guesstimate that the complete sunroof assembly weighs at most 30 lbs.

Think of it like this, your average wheel with tire weighs anywhere between 30 - 40 lbs (average wheel not a light weight wheel).

Anyhow that CF job is nice but I'm a daily driver and like to put my sun roof back once in a while. I'd like to find one that is functional. I don't care if it's CF and I can't see through it when it's closed, so long as I can still open the damn thing.

Sorry for the OT rant