Upload & Sell: Off
The dust cap "attaches", to use that expression very loosely (sic.), to the hood in a random manner: sometimes it latches, sometimes it falls off by itself. However, one can not attach the cap in any way onto the hoodless lens. Therefore, it looks like the hood's main purpose is to "hold" the cap (here and there, that is).
This decidedly Rube Goldberg type of hood/cap design doesn't really speak well of Canon engineering.
Speaking OT though: I've seen (on FM, where else) a photo of a bee in flight done at 8mm (though with the Sigma 8-16mm lens, not this FE), so why not an ABB.