diff --git a/data/json/monster_special_attacks/yrax_special_attacks.json b/data/json/monster_special_attacks/yrax_special_attacks.json
index b74fa8c5d8a31..b94a463d585e6 100644
--- a/data/json/monster_special_attacks/yrax_special_attacks.json
+++ b/data/json/monster_special_attacks/yrax_special_attacks.json
@@ -162,9 +162,13 @@
     "type": "effect_on_condition",
     "id": "EOC_QUADRAPHRACT_CONTROL",
     "effect": [
-      { "run_eocs": "eoc_update_quadraphract_walkers" },
       {
         "run_eocs": [
+          {
+            "id": "eoc_start_update_quadraphract_walkers",
+            "condition": { "math": [ "updating_quadraphracts", "!=", "1" ] },
+            "effect": [ { "run_eocs": "eoc_update_quadraphract_walkers" } ]
+          },
           {
             "id": "quadraphract_setup",
             "condition": { "math": [ "u_setup", "!=", "1" ] },
@@ -220,11 +224,17 @@
     "id": "eoc_update_quadraphract_walkers",
     "type": "effect_on_condition",
     "global": true,
-    "recurrence": "1 seconds",
     "condition": { "math": [ "u_monsters_nearby('mon_yrax_quadraphract', 'radius': 60)", ">=", "1" ] },
     "effect": [
-      { "u_run_monster_eocs": [ "eoc_quadraphract_walker" ], "monster_range": 65, "mtype_ids": [ "mon_yrax_quadraphract" ] }
-    ]
+      { "math": [ "updating_quadraphracts", "=", "1" ] },
+      { "queue_eocs": "eoc_update_quadraphract_walkers", "time_in_future": 1 },
+      {
+        "u_run_monster_eocs": [ "eoc_quadraphract_walker" ],
+        "monster_range": 65,
+        "mtype_ids": [ "mon_yrax_quadraphract" ]
+      }
+    ],
+    "false_effect": [ { "math": [ "updating_quadraphracts", "=", "0" ] } ]
   },
   {
     "id": "eoc_quadraphract_walker",
diff --git a/data/json/monster_weakpoints/yrax_weakpoints.json b/data/json/monster_weakpoints/yrax_weakpoints.json
index f155bb8f6eecb..a68bea1f19032 100644
--- a/data/json/monster_weakpoints/yrax_weakpoints.json
+++ b/data/json/monster_weakpoints/yrax_weakpoints.json
@@ -37,9 +37,17 @@
         "name": "a lightly armored segment",
         "coverage": 10,
         "difficulty": { "melee": 3, "ranged": 6 },
-        "coverage_mult": { "ranged": 2.5 },
+        "coverage_mult": { "ranged": 1.5 },
         "armor_mult": { "all": 0.75 }
       },
+      {
+        "id": "weak_point",
+        "name": "a weak segment",
+        "coverage": 5,
+        "difficulty": { "melee": 6, "ranged": 8 },
+        "coverage_mult": { "ranged": 2 },
+        "armor_mult": { "all": 0.1 }
+      },
       {
         "id": "heavy_armor",
         "name": "a segment of sloped armor",
diff --git a/data/json/monsters/yrax.json b/data/json/monsters/yrax.json
index cb93e19f9e132..3114f88a9905d 100644
--- a/data/json/monsters/yrax.json
+++ b/data/json/monsters/yrax.json
@@ -226,6 +226,7 @@
     "weight": "8282 kg",
     "diff": 40,
     "speed": 60,
+    "material": [ "gold", "steel" ],
     "symbol": "A",
     "aggression": 70,
     "aggro_character": false,