I wanted to craft a legendary, mainly to get the badge colored in on the character select screen. I picked the harpoon gun Rage to craft because its precursor is by far the cheapest.
After months of work — 77 Mystic Clovers, Gift of Might, Gift of Magic, Koda symbols, etc. — last night I did it!
To my surprise, there were no bells, fireworks or triumphant music. Whatever. While in the dialog to select the weapons stats, it struck me that I didn’t really care if any of my ‘toons use the legendary — its stats aren’t better than what I’ve got, no one will see me use an aquatic weapon, etc. So I sold it for 1,100 gold.
Still the “legendary” emblem was blank (!?!!?!!???). Maybe I needed to log off and back on? I read the description more closely — it’s for EQUIPPING a legendary, not crafting one.
Oh nooooooooooo! 
I did not cry. Not because I’m tough, but because I felt completely empty inside. I managed to resist the urge to shutdown my account, uninstall GW2, and reformat my hard drive, although at the time all that seemed pretty appealing.
So it’s back to the drawing board. The only bright side is that I was able to buy the dagger precursor with the proceeds from the harpoon gun.
I already have a few Mystic Clovers. Only 64 more to go. :/