In this video I show how you can use Cura to increment the bed heater in order to allow for better heat distribution on the Ender Extender kit with a stock bed heater. The 2 main problems I ran into with the stock bed heater on the Ender Extender 400xl were: PETG 85C - the thermal run away alarm would trigger and shut the printer down PLA 60C - on larger prints the corners would lift Both problems were caused by the large heat bed acting as a heat sink and not allowing for proper heating. In this video I am using an Ender 3 with an Ender Extender 400XL Kit. I've had the kit for over a year and love it! If you are looking to purchase one, I have affiliate links below, thank you. GCODE: https://lucasbuildsstuff.com/blogs/tips-tricks-1/increment-bed-heating-in-cura CHEP's video on Cura Start Gcode: https://www.youtube.com/watch?v=nQLJrSf4aXE 3d Printer Tuning Guide by Teaching Tech: https://teachingtechyt.github.io/calibration.html Affiliate Links: PETG: https://amzn.to/3KtE3pY PLA: https://amzn.to/3OI4F9o Ender Extender Kit: https://enderextender.com/collections/ender-3?bg_ref=117:oeDw5fndNF