diff --git a/cheesy_powergen.json b/cheesy_powergen.json
index 2649f27..03838d4 100644
--- a/cheesy_powergen.json
+++ b/cheesy_powergen.json
@@ -1,4 +1,54 @@
 [
+  {
+    "id": "hydropower",
+    "name": "hydrodynamic power",
+    "default": "running_water",
+    "type": "ammunition_type"
+  },
+  {
+    "id": "running_water",
+    "type": "AMMO",
+    "category": "chems",
+    "name": "running water",
+    "name_plural": "running water",
+    "description": "Seeing this is a bug.",
+    "weight": 0,
+    "volume": 0,
+    "bashing": 1,
+    "phase": "liquid",
+    "material": "water",
+    "flags": [ "PSEUDO", "PERPETUAL" ],
+    "fuel": { "energy": 1 },
+    "symbol": "?",
+    "color": "magenta",
+    "count": 1,
+    "ammo_type": "hydropower"
+  },
+  {
+    "id": "gravpower",
+    "name": "gravity power",
+    "default": "gravity_power",
+    "type": "ammunition_type"
+  },
+  {
+    "id": "gravity_power",
+    "type": "AMMO",
+    "category": "chems",
+    "name": "gravity power",
+    "name_plural": "gravity power",
+    "description": "Seeing this is a bug.",
+    "weight": 0,
+    "volume": 0,
+    "bashing": 1,
+    "phase": "liquid",
+    "material": "water",
+    "flags": [ "PSEUDO", "PERPETUAL" ],
+    "fuel": { "energy": 1 },
+    "symbol": "?",
+    "color": "magenta",
+    "count": 1,
+    "ammo_type": "gravpower"
+  },
 {
     "type": "recipe",
     "result": "pico_hydro_setup",
@@ -38,7 +88,7 @@
     "broken_color": "red",
     "damage_modifier": 80,
     "item": "pico_hydro_setup",
-	"fuel_type": "gasoline",
+	"fuel_type": "running_water",
     "difficulty": 2,
     "durability": 100,
     "cold_affects_start": false,
@@ -57,12 +107,12 @@
     "category": "CC_OTHER",
     "subcategory": "CSC_OTHER_VEHICLES",
     "skill_used": "fabrication",
-    "difficulty": 2,
+    "difficulty": 3,
     "time": 6000,
     "reversible": true,
     "autolearn": true,
-    "qualities": [ { "id": "HAMMER", "level": 1 }, { "id": "SAW_W", "level": 1 } ],
-    "components": [ [ [ "2x4", 4 ] ], [ ["bag_canvas", 1] ], [ [ "rock", 4 ] ], [ ["rope_30", 1] ] ]
+    "qualities": [ { "id": "HAMMER", "level": 1 }, { "id": "SAW_W", "level": 1 }, { "id": "CHISEL", "level": 1 } ],
+    "components": [ [ [ "2x4", 4 ] ], [ ["bag_canvas", 1] ], [ [ "rock", 4 ] ], [ ["rope_30", 1] ], [ ["mold_plastic", 1] ] ]
   }, 
   {
     "type": "GENERIC",
@@ -70,12 +120,12 @@
     "symbol": "o",
     "color": "brown",
 	"looks_like": "crane_medium",
-    "name": "Gravity powered engine",
+    "name": "Gravity powered engines",
     "name_plural": "Gravity powered engines",
-    "description": "A heavy sack hung by a rope, running through some gears. Should power a bicycle alternator, but not much more.",
+    "description": "A heavy sack hung by a rope, running through some gears. Should power a small LED lamp, but not much more.",
     "price": 8000,
-    "material": [ "wood", "steel", "cotton"],
-    "weight": 10000,
+    "material": [ "wood", "cotton", "plastic"],
+    "weight": 20000,
     "volume": 50,
     "bashing": 2,
     "to_hit": -1,
@@ -90,17 +140,17 @@
     "broken_color": "red",
     "damage_modifier": 80,
     "item": "gravity_powered_engine",
-	"fuel_type": "gasoline",
+    "fuel_type": "gravity_power",
     "difficulty": 2,
     "durability": 100,
     "cold_affects_start": false,
-    "noise_factor": 0,
+    "noise_factor": 1,
     "damaged_power_factor": 0.5,
     "m2c": 50,
     "epower": 0,
-    "power": 100,
+    "power": 85,
     "energy_consumption": 0,
-    "flags": [ "ENGINE", "TOOL_WRENCH", "E_ALTERNATOR", "E_HIGHER_SKILL", "E_STARTS_INSTANTLY", "OBSTACLE", "CONTROLS" ],
-    "description": "A heavy sack hung by a rope, running through some gears. Should power a bicycle alternator, but not much more."
+    "flags": [ "ENGINE", "TOOL_WRENCH", "E_ALTERNATOR", "E_HIGHER_SKILL", "E_STARTS_INSTANTLY", "CONTROLS" ],
+    "description": "A heavy sack hung by a rope, running through some gears. Should power a small LED lamp, but not much more."
   }
 ]
\ No newline at end of file