I've been wondering how the drop rates for GB Maze first boss are split between the crawlers and the chest. And for the Gaerthiel chest.

I'm looking for stats on drops from crawlers, and stats from drops of box (for Symbols and Superior third Marks), with separate measures for the First Boss chest and the twin's chest.
If some could post stats, that would be great, I'll do mine too. If you've got some info, thanks a lot for posting it. I'll sum up the whole aggregated stats here.

(note: I do mean stats, not feeling from experience, so that'd be a real counting from your runs)