diff --git a/src/entity/character.rs b/src/entity/character.rs
index 5d898b0..4c7f140 100644
--- a/src/entity/character.rs
+++ b/src/entity/character.rs
@@ -153,29 +153,8 @@ impl CharacterTechniques {
     pub fn as_bytes(&self) -> [u8; 20] {
         self.techs.iter()
             .fold([0xFF; 20], |mut techlist, (tech, level)| {
-                let index = match tech {
-                    Technique::Foie => 0,
-                    Technique::Gifoie => 1,
-                    Technique::Rafoie => 2,
-                    Technique::Barta => 3,
-                    Technique::Gibarta => 4,
-                    Technique::Rabarta => 5,
-                    Technique::Zonde => 6,
-                    Technique::Gizonde => 7,
-                    Technique::Razonde => 8,
-                    Technique::Grants => 9,
-                    Technique::Deband => 10,
-                    Technique::Jellen => 11,
-                    Technique::Zalure => 12,
-                    Technique::Shifta => 13,
-                    Technique::Ryuker => 14,
-                    Technique::Resta => 15,
-                    Technique::Anti => 16,
-                    Technique::Reverser => 17,
-                    Technique::Megid => 18,
-                };
-
-                techlist[index] = level.0 - 1;
+                let index = tech.as_value();
+                techlist[index as usize] = level.0 - 1;
                 techlist
             })
     }
diff --git a/src/entity/item/tech.rs b/src/entity/item/tech.rs
index b7faeaa..326aab7 100644
--- a/src/entity/item/tech.rs
+++ b/src/entity/item/tech.rs
@@ -24,6 +24,31 @@ pub enum Technique {
     Megid,
 }
 
+impl Technique {
+    pub fn as_value(&self) -> u8 {
+        match self {
+            Technique::Foie => 0,
+            Technique::Gifoie => 1,
+            Technique::Rafoie => 2,
+            Technique::Barta => 3,
+            Technique::Gibarta => 4,
+            Technique::Rabarta => 5,
+            Technique::Zonde => 6,
+            Technique::Gizonde => 7,
+            Technique::Razonde => 8,
+            Technique::Grants => 9,
+            Technique::Deband => 10,
+            Technique::Jellen => 11,
+            Technique::Zalure => 12,
+            Technique::Shifta => 13,
+            Technique::Ryuker => 14,
+            Technique::Resta => 15,
+            Technique::Anti => 16,
+            Technique::Reverser => 17,
+            Technique::Megid => 18,
+        }
+    }
+}
 
 #[derive(Copy, Clone, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)]
 pub struct TechniqueDisk {
@@ -33,6 +58,11 @@ pub struct TechniqueDisk {
 
 impl TechniqueDisk {
     pub fn as_bytes(&self) -> [u8; 16] {
-        [0; 16]
+        let mut result = [0; 16];
+        result[0] = 3;
+        result[1] = 2;
+        result[2] = self.level as u8 - 1;
+        result[4] = self.tech.as_value();
+        result
     }
 }
diff --git a/src/ship/drops/tech_table.rs b/src/ship/drops/tech_table.rs
index 370f9c5..7e40ae6 100644
--- a/src/ship/drops/tech_table.rs
+++ b/src/ship/drops/tech_table.rs
@@ -100,7 +100,7 @@ impl TechniqueTable {
         let tech_weights = WeightedIndex::new(tech_rates.clone().map(|(_, stat)| stat.rate)).unwrap();
 
         let (tech, stat) = tech_rates.nth(tech_weights.sample(rng)).unwrap();
-        let level = rng.gen_range(stat.min, stat.max+1);
+        let level = rng.gen_range(stat.min, stat.max+1) + 1;
 
         Some(ItemDropType::TechniqueDisk(TechniqueDisk {
             tech: *tech,