Heh.... people claim to have not used any supports, but for the life of me I can't see how they'd do it on certain parts.... guess that's a big part of the learning experience as well...
I skimmed through the parts, nothing stands out that needs supports. Only overhangs over ~ 50 degrees really need supports. You can bridge a long ways w/o supports w/ good cooling. I'd suggest to use a fan nozzle that coves at least 180 degrees around the nozzle if possible. Maybe upgrade the part cooling fan as well. I replaced mine within the first week w/ a powerful af Nidec.