I'm at 22 with no crystals spent. I think my luck is a little bit better, though, so I'm expecting a regression to the mean.
I'm going to get what I can now, not going to spend any crystals on the ship. This drop rate is a little worse than when it comes out for real, but I've got 28.5 free attempts per day with my choice of decent gear. So I'll get what I can while the getting is good, but at the end of the day I'm going to have to farm it on a hard node eventually anyway, so no sense in spending crystals that are better used on gear I can use right now.