The Smallest Whistle

@HonzaJaros It most likely looks like bridges are collapsing. Try reducing the print speed or increasing bridge overhang parameter.

@JanStech I have printed 1 as advised, didnt work, printed one as oposite bridging and that work (short side).
so i printed 20, and 12 don't work :((

any advice?
mk4s, mk4, 0.2, esun pla

@Anton_1945564 try to use the advice on how to print which is in the description of the model