Is this correct… am I missing anything? … thanks…

START GCODE…

G28 ;home all axes

G1 Z0.2 F1200 ;raise nozzle

G92 E0 ;reset extrusion distance

G1 X100 Y0 E12 F600 ;purge nozzle

G92 E0 ;reset extrusion distance

END GCODE…

M104 S0 ;turn off extruder/hotend heat

M140 S0 ;turn off bed heat

G91 ;relative positioning

G1 E-1 F300 ;retract the filament before lifting the nozzle to release some of the pressure

G1 Z+1 E-2 F300 ;move Z up and retract filament 2mm

G90 ;absolute positioning

G1 X20 Y115 F1000 ;move bed forward and hotend towards the tower

M84 ;disable motors

WIDTH: 120mm

DEPTH: 120mm

HEIGHT: 120mm

HEATED BED: checked

MACHINE CENTER IS ZERO: unchecked

GCODE FLAVOE: RepRap

XMIN: 75

YMIN: 18

XMAX: 18

YMAX: 35

MATERIAL DIAM: 1.75mm

NOZZLE SIZE: 0.4mm

GANTRY HEIGHT: 99999999999