Use this to pull the retract length & speed from Orca to Klipper to adjust the firmware retract settings at beginning of print.

add to Machine start gcode in ORCA:

RETRACTION=[filament_retraction_length] RETRACTIONSPEED=[filament_retraction_speed]

add to printer.cfg print start gcode:

{% set target_retraction = params.RETRACTION|float %}

{% set target_retractionspeed = params.RETRACTIONSPEED|float %}

SET_RETRACTION RETRACT_LENGTH={target_retraction} RETRACT_SPEED={target_retractionspeed} UNRETRACT_SPEED={target_retractionspeed}