automatic bird feeder

I have desigend an “Automatic” bird feeder.Simlpy screw in a normal PET-bottle and it will automatically refill the feeder. Some notes of interest:PET-Bottle diameter can have max. Ø85Bottle must me cut to a length of appr. 10-11cmOnly “small” feed is possible without clogging, e.g. Sunflower seedsWindows, sitting bars for the birds and roof battens must be glued to the main parts(bars and roof battens must have the correct orientation, keep in mind)There is a 2-part design with just the roof as an extra part to screw on and there is alsoa 3-part design with bottom, middle and roof. (see photos)For the 3-part design you have to press in 6 heat inserts (M4 x 8 x 6mm or shorter) andscrew bottom and middle part together with 6 screws (M4 x 12mm or shorter)There are some drainage slots on the bottom to prevent water from staying insideFor best print results, just use my settings (on some parts I´ve made fuzzy-skin, manual supportsor some other special settings)Each of the parts can be prin