diff --git a/calc2.py b/calc2.py
index fcb9a9c..5c1c26d 100644
--- a/calc2.py
+++ b/calc2.py
@@ -172,6 +172,10 @@ MACHINES = {
     'offshore-pump',
 }
 
+MACHINES_REAL = {
+    'assembler': ('_assembler-2', 0.75),
+}
+
 
 def get_resource_name(orig_name: str, recipe_name: str) -> str:
     if orig_name in MACHINES:
@@ -234,20 +238,37 @@ def drop_machines(group: ResourceGroup) -> tuple[ResourceGroup, ResourceGroup]:
     return group_wo_machines, group_machines
 
 
+def get_real_resource_counts(group: ResourceGroup) -> list[tuple[str, float]]:
+    def get_real_rc(rc: tuple[str, float]) -> tuple[str, float]:
+        resource, count = rc
+        for resource_from, (resource_real, ratio) in MACHINES_REAL.items():
+            if resource.startswith(resource_from):
+                resource = resource.replace(resource_from, resource_real)
+                count = count / ratio
+                break
+        return resource, count
+
+    rcs = list(map(get_real_rc, group.items()))
+    return rcs
+
+
 def print_resource_group(group: ResourceGroup) -> None:
-    for resource, count in sorted(group.items()):
-        print(f'    {resource:40}: {dot_align(tuple(group.values()), count)}')
+    rcs = get_real_resource_counts(group)
+    cs = tuple(map(lambda rc: rc[1], rcs))
+    for resource, count in sorted(rcs):
+        print(f'    {resource:40}: {dot_align(cs, count)}')
 
 
-SPM = 1
+# science-per-second
+SPS = 1
 bus_groups: list[ResourceGroup] = [
-    {'science-red': SPM},
-    {'science-green': SPM},
-    {'science-gray': SPM},
-    {'science-blue': SPM},
-    {'science-purple': SPM},
-    {'science-yellow': SPM},
-    {'science-white': SPM},
+    {'science-red': SPS},
+    {'science-green': SPS},
+    {'science-gray': SPS},
+    {'science-blue': SPS},
+    {'science-purple': SPS},
+    {'science-yellow': SPS},
+    {'science-white': SPS},
 ]
 bus_base = {
     'iron-plate',
@@ -263,7 +284,7 @@ bus_base = {
     'rocket-fuel',
 }
 
-print(f'{SPM=}')
+print(f'{SPS=}')
 print(f'{bus_base=}')
 bus_inputs = {}
 for group in bus_groups:
@@ -344,6 +365,9 @@ oil_inputs, oil_machines = drop_machines(oil_inputs)
 
 if pg := oil_inputs.pop('petroleum-gas', 0) > 0:
     raise RuntimeError(f'petrolium-gas > 0: {pg=}')
+# ignore heavy/light oil overflow
+oil_inputs.pop('light-oil', 0)
+oil_inputs.pop('heavy-oil', 0)
 
 smelting_outputs = add_recipe(bus_inputs, oil_inputs, -1)
 smelting_outputs = add_recipe(smelting_outputs, chemical_inputs, -1)
@@ -352,7 +376,7 @@ print('smelting outputs')
 print_resource_group(smelting_outputs)
 
 # smelting
-smelting_base = {'furnace', 'iron-ore', 'copper-ore', 'coal', 'stone', 'steam', 'water', 'crude-oil'}
+smelting_base = {'furnace', 'iron-ore', 'copper-ore', 'coal', 'stone', 'steam', 'water', 'crude-oil', 'light-oil'}
 
 # combine to compute mining requirements
 smelting_inputs, intermediates = reduce_to_base_resources(smelting_outputs, smelting_base)
@@ -379,7 +403,7 @@ _, mining_machines = drop_machines(mining_inputs)
 def despecify_machines(group: ResourceGroup) -> ResourceGroup:
     # assembler[belt-y] -> assembler, etc.
     result = {}
-    for resource, count in group.items():
+    for resource, count in get_real_resource_counts(group):
         if '[' in resource:
             resource = resource[: resource.find('[')]
         count = math.ceil(count)