diff --git a/aws-experiment-launch/create_instances.py b/aws-experiment-launch/create_instances.py
index 49bf1f52d..b97b2f1e1 100644
--- a/aws-experiment-launch/create_instances.py
+++ b/aws-experiment-launch/create_instances.py
@@ -11,11 +11,13 @@ from utils import utils, spot_fleet, logger
 
 LOGGER = logger.getLogger(__file__)
 
+
 class InstanceResource:
     ON_DEMAND = 1
     SPOT_INSTANCE = 2
     SPOT_FLEET = 3
 
+
 def run_one_region_instances(config, region_number, number_of_instances, instance_resource=InstanceResource.ON_DEMAND):
     region_name = config[region_number][utils.REGION_NAME]
     # Create session.
@@ -30,8 +32,10 @@ def run_one_region_instances(config, region_number, number_of_instances, instanc
         return node_name_tag, ec2_client
     elif instance_resource == InstanceResource.SPOT_FLEET:
         instance_type_list = ['t2.micro', 't2.small', 'm3.medium']
-        node_name_tag = spot_fleet.request_spot_fleet(
-            config, ec2_client, region_number, int(number_of_instances), instance_type_list)
+        node_name_tag = spot_fleet.request_spot_fleet_with_on_demand(
+            config, ec2_client, region_number, int(number_of_instances), 1, instance_type_list)
+        # node_name_tag = spot_fleet.request_spot_fleet(
+        #     config, ec2_client, region_number, int(number_of_instances), instance_type_list)
         return node_name_tag, ec2_client
     else:
         return None, None
diff --git a/aws-experiment-launch/utils/launch_template.py b/aws-experiment-launch/utils/launch_template.py
index 7939b41ca..1ca9e73da 100644
--- a/aws-experiment-launch/utils/launch_template.py
+++ b/aws-experiment-launch/utils/launch_template.py
@@ -2,34 +2,37 @@
 import utils
 
 
-def create(config, ec2_client, region_number, instance_type):
+def get_launch_template_name(config, region_number):
+    return 'benchmark-' + config[region_number][utils.REGION_NAME]
+
+
+def create(config, ec2_client, region_number):
     return ec2_client.create_launch_template(
         # DryRun=True,
-        LaunchTemplateName='richard-benchmark-' + \
-        config[region_number][utils.REGION_NAME] + '-' + instance_type,
+        LaunchTemplateName=get_launch_template_name(config, region_number),
         LaunchTemplateData={
             'IamInstanceProfile': {
                 'Name': utils.IAM_INSTANCE_PROFILE
             },
             'ImageId': config[region_number][utils.REGION_AMI],
-            'InstanceType': instance_type,
+            # 'InstanceType': instance_type,
             'KeyName':  config[region_number][utils.REGION_KEY],
             'UserData': utils.USER_DATA_BASE64,
             'SecurityGroupIds': [
                 config[region_number][utils.REGION_SECURITY_GROUP_ID]
             ],
             # 'InstanceInitiatedShutdownBehavior': 'stop',
-            # 'TagSpecifications': [
-            #     {
-            #         'ResourceType': 'instance',
-            #         'Tags': [
-            #             {
-            #                 'Key': 'Name',
-            #                 'Value': 'string'
-            #             }
-            #         ]
-            #     }
-            # ],
+            'TagSpecifications': [
+                {
+                    'ResourceType': 'instance',
+                    'Tags': [
+                        {
+                            'Key': 'LaunchTemplate',
+                            'Value': 'Yes'
+                        }
+                    ]
+                }
+            ],
             # 'InstanceMarketOptions': {
             #     'MarketType': 'spot',
             #     'SpotOptions': {
@@ -40,4 +43,4 @@ def create(config, ec2_client, region_number, instance_type):
             #     }
             # },
         }
-    )
+    )
\ No newline at end of file
diff --git a/aws-experiment-launch/utils/spot_fleet.py b/aws-experiment-launch/utils/spot_fleet.py
index 12b1c929f..f98bb0937 100644
--- a/aws-experiment-launch/utils/spot_fleet.py
+++ b/aws-experiment-launch/utils/spot_fleet.py
@@ -1,7 +1,9 @@
 import utils
 import logger
+import launch_template
 LOGGER = logger.getLogger(__file__)
 
+
 def create_launch_specification(config, region_number, instanceType):
     return {
         # Region irrelevant fields
@@ -37,12 +39,33 @@ def create_launch_specification(config, region_number, instanceType):
         # }
     }
 
+
 def create_launch_specification_list(config, region_number, instance_type_list):
     return list(map(lambda type: create_launch_specification(config, region_number, type), instance_type_list))
 
+
+def get_launch_template(config, region_number, instance_type):
+    return {
+        'LaunchTemplateSpecification': {
+            'LaunchTemplateName': launch_template.get_launch_template_name(config, region_number),
+            'Version': '1'
+        },
+        'Overrides': [
+            {
+                'InstanceType': instance_type
+            }
+        ]
+    }
+
+
+def get_launch_template_list(config, region_number, instance_type_list):
+    return list(map(lambda type: get_launch_template(config, region_number, type), instance_type_list))
+
+
 def request_spot_fleet(config, ec2_client, region_number, number_of_instances, instance_type_list):
     LOGGER.info("Requesting spot fleet")
-    LOGGER.info("Creating node_name_tag: %s" % utils.get_node_name_tag(region_number))
+    LOGGER.info("Creating node_name_tag: %s" %
+                utils.get_node_name_tag(region_number))
     # https://boto3.readthedocs.io/en/latest/reference/services/ec2.html#EC2.Client.request_spot_fleet
     response = ec2_client.request_spot_fleet(
         # DryRun=True,
@@ -53,8 +76,28 @@ def request_spot_fleet(config, ec2_client, region_number, number_of_instances, i
             'LaunchSpecifications': create_launch_specification_list(config, region_number, instance_type_list),
             # 'SpotPrice': 'string', # The maximum price per unit hour that you are willing to pay for a Spot Instance. The default is the On-Demand price.
             'TargetCapacity': number_of_instances,
-            'OnDemandTargetCapacity': 0,
             'Type': 'maintain'
         }
     )
-    return response
\ No newline at end of file
+    return response
+
+
+def request_spot_fleet_with_on_demand(config, ec2_client, region_number, number_of_instances, number_of_on_demand, instance_type_list):
+    LOGGER.info("Requesting spot fleet")
+    LOGGER.info("Creating node_name_tag: %s" %
+                utils.get_node_name_tag(region_number))
+    # https://boto3.readthedocs.io/en/latest/reference/services/ec2.html#EC2.Client.request_spot_fleet
+    response = ec2_client.request_spot_fleet(
+        # DryRun=True,
+        SpotFleetRequestConfig={
+            # https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/spot-fleet.html#spot-fleet-allocation-strategy
+            'AllocationStrategy': 'diversified',
+            'IamFleetRole': 'arn:aws:iam::656503231766:role/RichardFleetRole',
+            'LaunchTemplateConfigs': get_launch_template_list(config, region_number, instance_type_list),
+            # 'SpotPrice': 'string', # The maximum price per unit hour that you are willing to pay for a Spot Instance. The default is the On-Demand price.
+            'TargetCapacity': number_of_instances,
+            'OnDemandTargetCapacity': number_of_on_demand,
+            'Type': 'maintain'
+        }
+    )
+    return response