VESC IDs 61/79 were from a now-reverted #735 refactor; hardware uses 56/68.
RPM_PER_STEER_UNIT=3 is needed by drive_task for left/right differential.
Display BL/RST already correct (GPIO15/16 CAN, GPIO2/14 display per schematic).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>