diff --git a/modifications/modifications.json b/modifications/modifications.json
index 8aeff98..4787050 100644
--- a/modifications/modifications.json
+++ b/modifications/modifications.json
@@ -10,7 +10,7 @@
     "damagedist": {"id": 40, "name": "damage", "type": "object", "hidden": true, "method": "overwrite"},
     "distdraw": {"id": 6, "name": "distdraw", "type": "percentage", "method": "multiplicative", "higherbetter": false},
     "duration": {"id": 7, "name": "duration", "type": "percentage", "method": "multiplicative", "higherbetter": true},
-    "eff": {"id": 8, "name": "eff", "type": "percentage", "method": "additive", "higherbetter": false},
+    "eff": {"id": 8, "name": "eff", "type": "percentage", "method": "multiplicative", "higherbetter": false},
     "engcap": {"id": 9, "name": "engcap", "type": "percentage", "method": "multiplicative", "higherbetter": true},
     "engrate": {"id": 10, "name": "engrate", "type": "percentage", "method": "multiplicative", "higherbetter": true},
     "explres": {"id": 11, "name": "explres", "type": "percentage", "method": "additive", "higherbetter": true},
@@ -44,7 +44,7 @@
     "spinup": {"id": 32, "name": "spinup", "type": "percentage", "method": "multiplicative", "higherbetter": false},
     "syscap": {"id": 33, "name": "syscap", "type": "percentage", "method": "multiplicative", "higherbetter": true},
     "sysrate": {"id": 34, "name": "sysrate", "type": "percentage", "method": "multiplicative", "higherbetter": true},
-    "thermload": {"id": 35, "name": "thermload", "type": "percentage", "method": "additive", "higherbetter": false},
+    "thermload": {"id": 35, "name": "thermload", "type": "percentage", "method": "multiplicative", "higherbetter": false},
     "thermres": {"id": 36, "name": "thermres", "type": "percentage", "method": "additive", "higherbetter": true},
     "wepcap": {"id": 37, "name": "wepcap", "type": "percentage", "method": "multiplicative", "higherbetter": true},
     "weprate": {"id": 38, "name": "weprate", "type": "percentage", "method": "multiplicative", "higherbetter": true},
diff --git a/modifications/modifierActions.json b/modifications/modifierActions.json
index 8b1c5f1..a22641c 100644
--- a/modifications/modifierActions.json
+++ b/modifications/modifierActions.json
@@ -171,21 +171,21 @@
   "special_choke_canister": {},
   "special_feedback_cascade_cooled": {
     "damage": -0.2,
-    "thermload": -40
+    "thermload": -0.4
   },
   "special_super_penetrator_cooled": {
     "reload": 0.5,
-    "thermload": -40
+    "thermload": -0.4
   },
   "special_concordant_sequence": {
-    "thermload": 50
+    "thermload": 0.5
   },
   "special_corrosive_shell": {
     "ammo": -0.2
   },
   "special_plasma_slug_cooled": {
     "damage": -0.1,
-    "thermload": -40
+    "thermload": -0.4
   },
   "special_plasma_slug_pa": {
     "damage": -0.1
@@ -195,7 +195,7 @@
   "special_distortion_field": {},
   "special_drag_munitions": {},
   "special_emissive_munitions": {
-    "thermload": 100
+    "thermload": 1
   },
   "special_feedback_cascade": {
     "breachdmg": -0.2,
@@ -218,7 +218,7 @@
   },
   "special_incendiary_rounds": {
     "rof": 0.05263157894736842,
-    "thermload": 200,
+    "thermload": 2,
     "damagedist": {
       "T": 0.9,
       "K": 0.1
@@ -318,14 +318,14 @@
   },
   "special_engine_cooled": {
     "mass": 0.05,
-    "thermload": -10
+    "thermload": -0.1
   },
   "special_engine_haulage": {
     "optmass": 0.1
   },
   "special_engine_overloaded": {
     "optmul": 0.04,
-    "thermload": 10
+    "thermload": 0.1
   },
   "special_engine_toughened": {
     "integrity": 0.15
@@ -348,7 +348,7 @@
     "mass": -0.1
   },
   "special_fsd_cooled": {
-    "thermload": -10
+    "thermload": -0.1
   },
   "special_lock_breaker": {},
   "special_powerplant_highcharge": {
@@ -356,7 +356,7 @@
     "pgen": 0.05
   },
   "special_powerplant_cooled": {
-    "eff": -10
+    "eff": -0.1
   },
   "special_powerplant_toughened": {
     "integrity": 0.15