I printed an Airco DH9 yesterday, I tried numerous times the day before but kept getting a mess on the printer.
So I re-leveled the bed, going over it several times until I was satisfied but also changed the layer height from .1mm to .15mm, that seemed to fix the problem.
Of course another problem crept in...I ran out of filament!!! I quickly(?) put on a piece of another spool I had and finished the print, but when I tried to remove the supports the plane came apart at the seam where one color stopped and the other began. I think the total time to print was 8 hours, I set the print speed down to 50mm/sec.
No problem though, a bit of super glue and the halves were joined together once again. Now I have yet another plane to paint and decal.