diff --git a/config/config.default.yaml b/config/config.default.yaml
index c9ee439b..7e2f7077 100644
--- a/config/config.default.yaml
+++ b/config/config.default.yaml
@@ -888,6 +888,13 @@ solving:
       Threads: 8
       LpMethod: 2
       Crossover: 0
+      RelGap: 1.e-6
+      Dualize: 0
+    copt-gpu:
+      LpMethod: 6
+      GPUMode: 1
+      PDLPTol: 1.e-5
+      Crossover: 0
     cbc-default: {} # Used in CI
     glpk-default: {} # Used in CI
 
diff --git a/rules/common.smk b/rules/common.smk
index 2b8495e1..ef518beb 100644
--- a/rules/common.smk
+++ b/rules/common.smk
@@ -55,7 +55,7 @@ def dynamic_getter(wildcards, keys, default):
     scenario_name = wildcards.run
     if scenario_name not in scenarios:
         raise ValueError(
-            f"Scenario {scenario_name} not found in file {config['run']['scenario']['file']}."
+            f"Scenario {scenario_name} not found in file {config['run']['scenarios']['file']}."
         )
     config_with_scenario = scenario_config(scenario_name)
     config_with_wildcards = update_config_from_wildcards(
@@ -81,7 +81,8 @@ def config_provider(*keys, default=None):
 def solver_threads(w):
     solver_options = config_provider("solving", "solver_options")(w)
     option_set = config_provider("solving", "solver", "options")(w)
-    threads = solver_options[option_set].get("threads", 4)
+    solver_option_set = solver_options[option_set]
+    threads = solver_option_set.get("threads") or solver_option_set.get("Threads") or 4
     return threads
 
 
diff --git a/scripts/prepare_sector_network.py b/scripts/prepare_sector_network.py
index 1916c62e..7426c76f 100644
--- a/scripts/prepare_sector_network.py
+++ b/scripts/prepare_sector_network.py
@@ -688,7 +688,7 @@ def add_co2_tracking(n, costs, options):
         e_nom_extendable=True,
         e_nom_max=e_nom_max,
         capital_cost=options["co2_sequestration_cost"],
-        marginal_cost=0.1,
+        marginal_cost=-0.1,
         bus=sequestration_buses,
         lifetime=options["co2_sequestration_lifetime"],
         carrier="co2 sequestered",