birdfeeder 2.0

Improved version of my first birdfeeder. I solved constructive issues and tried make it nice visual. Print all files separately and glue them togerther. File "bf02_plch" you have to print twice maybe with infill of 25 or more % and "bf02_ukr" and "bf02_col" four times. Im nearly sure it will be no probs by assembling.