The falcon turned out... less than well
Realising i'm going to run out of filament, i've stopped the print and restarted with 0 infill (2 perimeters).
That was on the solid model, instead of printing the shell version of the model from the start. That resulted in a ton of gaps, especially on the top of the head. The filament started going weird near the top again (i'm starting to believe it has something to do with temperature or something - both times it was fine until around the time i opened the door to the balcony... it's 30-40 deg C outside, mind you, so that might not be it).
The supports broke on both sides, creating a mess i had to cut off with pliers. Interestingly, the front support column re-appeared about half way up - after it broke, the head started depositing a nest of loose strings on the falcon's chest, that eventually built up to a platform sturdy enough for it to start printing the proper column. Pretty bizarre, but i've noticed it happening before. I even saw the supports start bifurcating and eventually reforming after breaking. Funny stuff, like watching some bizarre crystalline animal evolve.