- Switch from eMMC hardware boot partition (0x48) to user area (0x78)
- p1 starts at sector 32768 to leave room for bootloader in GPT gap
- Write idbloader at sector 64, u-boot.itb at sector 16384
- Add experimental findings explaining why first approach failed
- Add verification steps (hexdump RKNS check, PARTITION_CONFIG check)
- All references from actual docs (Rockchip wiki, Gentoo, Khadas, PINE64)