I really don't get this xenophobia towards products made "off-shore." If everyone felt that way about products made in the USA (not all are quality, by the way), the USA wouldn't be the superpower it is... er... was, a few years ago.
Malaysia, China et al. have been producing electrical components for years, including some that are used, I imagine, in L lenses.
Manufacturing in the "developed" world has had its day; now it is time for others to experience the boom. I only wish it was an optical business owned and run by Malaysians making this lens instead of Canon. That would be fantastic for that country and for their people and you know what? The lens would probably be even cheaper, while the people in the factory still earned as much as they do under the red and white flag.
I don't see why you would want to screw on a hood for the pancake..then it would make it not a pancake 
I have the hood from my old 50 f1.8 and yes it works on the 40mm as well…no issues using it whatsoever..not even with a filter+hood combo..
But then, after i did that, it made the lans as big as any other normal lens..which defeated the purpose of wanting it because it was thin...
I agree. Use a hand!