Thread here describes problem (with images)
https://www.reddit.com/r/3Dprinting/comments/1mf7k2d/support_structure_in_petg_vs_pla/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button
Hoping this forum might offer some “K2-plus specific” help. Thanks!