diff --git a/klippy/rmmu.py b/klippy/rmmu.py
index 7b555e19..56058da4 100644
--- a/klippy/rmmu.py
+++ b/klippy/rmmu.py
@@ -292,7 +292,12 @@ def cmd_RMMU_START_PRINT(self, param):
 		self.start_print_param = param
 
 		self.filament_changes = 0
+		if self.is_sensor_triggered(self.toolhead_filament_sensor_t0):
+			raise self.printer.command_error("Filament detected in toolhead! Please unload the filament and restart the print.")
+
+		self.test_filaments(param)
 		self.toolhead_filament_sensor_t0.runout_helper.sensor_enabled = False
+		self.gcode.run_script_from_command('START_PRINT ' + str(param.get_raw_command_parameters().strip()))
 
 	desc_RMMU_TEST_FILAMENTS = "Tests if filaments, that are needed for the print, are available or not."
 	def cmd_RMMU_TEST_FILAMENTS(self, param):
@@ -927,8 +932,7 @@ def test_filaments(self, param):
 				toolhead = self.get_remapped_toolhead(i)
 				if not self.test_filament(toolhead):
 					self.select_filament(-1)
-					self.gcode.run_script_from_command('_RMMU_ON_START_PRINT_FILAMENT_TEST_FAILED TOOLHEAD=' + str(toolhead))
-					return
+					raise self.printer.command_error("Can not start print because Filament T" + str(toolhead) + " is not available!")
 
 		# release idler
 		self.select_filament(-1)
@@ -947,8 +951,7 @@ def test_filaments(self, param):
 							if spool == i:
 								counter += 1
 				if counter > 1:
-					self.gcode.run_script_from_command('_RMMU_ON_START_PRINT_SPOOL_JOIN_TEST_FAILED')
-					return
+					raise self.printer.command_error("Can not start print because joined spools are part of the print!")
 			self.ratos_echo("Spool join validated!")
 
 	def test_filament(self, filament):
diff --git a/macros.cfg b/macros.cfg
index 95d02ce2..275c525a 100644
--- a/macros.cfg
+++ b/macros.cfg
@@ -303,16 +303,6 @@ gcode:
 	# reset is_printing_gcode state
 	SET_GCODE_VARIABLE MACRO=START_PRINT VARIABLE=is_printing_gcode VALUE=False
 
-	# rmmu sanity check
-	{% if printer["rmmu"] is defined %}
-		RMMU_RESET
-		SET_FILAMENT_SENSOR SENSOR=toolhead_filament_sensor_t0 ENABLE=1
-		{% if printer["filament_switch_sensor toolhead_filament_sensor_t0"].filament_detected|lower == "true" %}
-			{ action_raise_error("Filament detected! Please unload the filament and restart the print.") }
-		{% endif %}
-		RMMU_TEST_FILAMENTS { rawparams }
-	{% endif %}
-
 	# update Frontend
 	SET_GCODE_VARIABLE MACRO=T0 VARIABLE=active VALUE=True
 	{% if printer["dual_carriage"] is defined %}
@@ -596,7 +586,6 @@ gcode:
 			{% endif %}
 		{% endif %}
 		RMMU_LOAD_FILAMENT TOOLHEAD={initial_tool} TEMP=-1
-		RMMU_START_PRINT { rawparams }
 	{% endif %}
 
 	# visual feedback
diff --git a/macros/rmmu.cfg b/macros/rmmu.cfg
index 10bbee92..7bf3e950 100644
--- a/macros/rmmu.cfg
+++ b/macros/rmmu.cfg
@@ -292,22 +292,3 @@ gcode:
 	{% else %}
 		{ action_raise_error("Toolhead T%s error!" % toolhead)}
 	{% endif %}
-
-
-[gcode_macro _RMMU_ON_START_PRINT_FILAMENT_TEST_FAILED]
-gcode:
-	# parameter
-	{% set toolhead = params.TOOLHEAD|default(-1)|int %}
-
-	DEBUG_ECHO PREFIX="_RMMU_ON_FILAMENT_TEST_FAILED" MSG="TOOLHEAD={toolhead}"
-
-	MOVE_FILAMENT TOOLHEAD={toolhead} MOVE=-100 SPEED=150
-
-	{ action_raise_error("Can not start print because Filament T%s is not available!" % toolhead)}
-
-
-[gcode_macro _RMMU_ON_START_PRINT_SPOOL_JOIN_TEST_FAILED]
-gcode:
-	DEBUG_ECHO PREFIX="_RMMU_ON_START_PRINT_SPOOL_JOIN_TEST_FAILED" MSG=""
-
-	{ action_raise_error("Can not start print because joined spools are part of the print!")}
diff --git a/scripts/ratos_rmmu_postprocessor.py b/scripts/ratos_rmmu_postprocessor.py
index 2b7f3519..b3b43e73 100644
--- a/scripts/ratos_rmmu_postprocessor.py
+++ b/scripts/ratos_rmmu_postprocessor.py
@@ -74,7 +74,7 @@ def process_file(args, sourcefile):
 
 			# get the start_print line number and fix color variable format
 			if start_print_line == 0:
-				if lines[line].rstrip().startswith("START_PRINT"):
+				if lines[line].rstrip().startswith("START_PRINT") or lines[line].rstrip().startswith("RMMU_START_PRINT"):
 					start_print_line = line
 					# fix color variable format
 					if "#" in lines[start_print_line].rstrip():