How to Modify a 3D printer/ Stop 3D Prints From Warping/ Help 3D prints Stick! - YouTube
Controlling print warping | 3D Printing with RepRap Cookbook
Big problem with Warping - PLA – Print tips (Archive) – Prusa3D Forum
Heavy warping with PLA, even though bed is at 75°C. (Dolly Prusa clone, nozzle at 205). Problem seems to have appeared after about half of the print. : r/FixMyPrint