I've done it. And it's balls-hard, especially in the board levels. Second visit to Ishra's Ark was equally difficult, with that one segment...and what with it being a crazy-long level. That one was aggravating for patience, instead of the usual boarding stuff. Oh, and the beginning of the second half of the Factory level, the last stretch of Hyuponia, plus nearly every mirror fairy moment. Hell, if it's worth mentioning, I even got an extra dreamstone more than the supposed total in the first level, though I do not recall anymore how...