References:

• https://reddit.com/r/anycubic/comments/y2waxu/tutorial_how_to_build_anycubic_marlin_source_code/
• https://reddit.com/r/anycubic/comments/ynvbj0/anycubic_kobra_working_config/

Changes:

• Enabled QUICK_HOME
• Change machine name from "Vyper" to "Kobra"
• Enabled SAVED_POSITIONS so G60/G61 can be used for filament change routine
• Disable startup jingle
• Swap X stepper address to accomodate the mainboard mod mentioned in this post (swap X_SLAVE_ADDRESS and E0_SLAVE_ADDRESS)
• Greatly reduce motherboard fan speed