diff --git a/src/errorfr.rs b/src/errorfr.rs
index d82b49e..cdcf8e0 100644
--- a/src/errorfr.rs
+++ b/src/errorfr.rs
@@ -31,10 +31,15 @@ pub enum Errorfr {
     #[error("Error 2.5: gear.json is missing. It's only required for the \"perfect mode\" item gen. \nYou should run \"--download Gear\" or \"--download All\".")]
     GearJsonMissing,
 
-    /// shiny data json is corrupt
+    /// gear data json is corrupt
     #[error("Error 2.6: gear.json is corrupt. It's only required for the \"perfect mode\" item gen. \nYou should run \"--download Gear\" or \"--download All\".\n{0:?}")]
     GearJsonCorrupt(serde_json5::Error),
 
+    /// gear data json cache could not be created
+    #[error("Error 2.7: unable to create file gear_cache.json.")]
+    GearJsonCacheCreateFail,
+    
+
     /// could not download the file
     #[error("Error 3.1: Download request failed. Check your network settings.")]
     JsonDlReqFail,
diff --git a/src/gearjson.rs b/src/gearjson.rs
index 97071d5..9ab2db9 100644
--- a/src/gearjson.rs
+++ b/src/gearjson.rs
@@ -1,8 +1,8 @@
-use serde::Deserialize;
+use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
 
 // the struct for the stuff I need in in Hashmap<String, GearJson> gear.json. its a big ass pain
-#[derive(Deserialize, PartialEq, Eq, Debug)]
+#[derive(Deserialize, Serialize, PartialEq, Eq, Debug)]
 pub struct GearJsonItem {
     identifications: Option<
         HashMap<
@@ -10,15 +10,15 @@ pub struct GearJsonItem {
         >
     >
 }
-#[derive(Deserialize, PartialEq, Eq, Debug)]
+#[derive(Deserialize, Serialize, PartialEq, Eq, Debug)]
 #[serde(untagged)]
 pub enum GearJsonItemInner {
     r#Struct(GearJsonItemInnerStruct),
     r#Int(i32)
 }
-#[derive(Deserialize, PartialEq, Eq, Debug)]
+#[derive(Deserialize, Serialize, PartialEq, Eq, Debug)]
 pub struct GearJsonItemInnerStruct {
-    max: i16,
-    min: i16,
-    raw: i16
+    max: i32,
+    min: i32,
+    raw: i32
 }
\ No newline at end of file
diff --git a/src/jsondl.rs b/src/jsondl.rs
index ef11deb..84aaf08 100644
--- a/src/jsondl.rs
+++ b/src/jsondl.rs
@@ -4,7 +4,8 @@ use crate::gearjson;
 use crate::jsonstruct::Shinystruct;
 use serde::Deserialize;
 use std::collections::HashMap;
-use std::fs;
+use std::{fs, io};
+use std::io::Write;
 
 pub fn load_idkeys(executable_path: &str) -> Result<HashMap<String, u8>, Errorfr> {
     // id_keys.json
@@ -20,14 +21,21 @@ pub fn load_shinystats(executable_path: &str) -> Result<Vec<Shinystruct>, Errorf
         .map_err(|_| Errorfr::ShinyJsonMissing)?)
         .map_err(|_| Errorfr::ShinyJsonCorrupt)
 }
-
 pub fn load_gear(executable_path: &str) -> Result<HashMap<String, gearjson::GearJsonItem>, Errorfr> {
-    // gear.json (ONLY FOR PERFECT ITEM FUNCTION GEN)
+    // gear.json (ONLY FOR DL gear.json)
     serde_json5::from_reader(
         &mut fs::File::open(executable_path.to_owned() + "/data/gear.json")
         .map_err(|_| Errorfr::GearJsonMissing)?)
         .map_err(Errorfr::GearJsonCorrupt)
 }
+pub fn load_gear_cache(executable_path: &str) -> Result<HashMap<String, gearjson::GearJsonItem>, Errorfr> {
+    // gear_cache.json (ONLY FOR PERFECT ITEM FUNCTION GEN)
+    serde_json5::from_reader(
+        &mut fs::File::open(executable_path.to_owned() + "/data/gear_cache.json")
+            .map_err(|_| Errorfr::GearJsonMissing)?)
+        .map_err(Errorfr::GearJsonCorrupt)
+}
+
 pub fn dl_json_fr(dlvalue: &String, executable_path: &str) {
     let jsons = DownloadJsons::from(dlvalue.clone());
     if let Err(e) = fs::create_dir_all(format!("{}{}", executable_path, "/data/")) {
@@ -53,12 +61,23 @@ pub fn dl_json_fr(dlvalue: &String, executable_path: &str) {
         }
     }
     if jsons == DownloadJsons::All || jsons == DownloadJsons::Gear {
-        if let Err(e) = dl_json(
+        match dl_json(
             "https://raw.githubusercontent.com/Wynntils/Static-Storage/main/Reference/gear.json".parse().unwrap(),
             format!("{}{}", executable_path, "/data/gear.json"),
         ) {
-            // error handling below
-            println!("{} Filename: {}", e, dlvalue)
+            Err(e) => {
+                // error handling below
+                println!("{} Filename: {}", e, dlvalue);
+            },
+            Ok(t) => {
+                println!("Now generating gear_cache.json (otherwise, when running --perfect it will take ages each time!)");
+                let frfrnocap = serde_json::to_vec(
+                    &load_gear(executable_path)
+                        .unwrap()
+                ).unwrap();
+                let mut outer = fs::File::create(format!("{}{}",executable_path, "/data/gear.json")).map_err(|_| Errorfr::GearJsonCacheCreateFail).unwrap();
+                outer.write_all(&frfrnocap).unwrap();
+            }
         }
     }
 }
diff --git a/src/main.rs b/src/main.rs
index c6abdac..374fff7 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -156,7 +156,7 @@ fn cook(out: &mut Vec<u8>, debug_mode: &bool, ver: EncodingVersion, json_config:
         ItemTypeDeser::Gear | ItemTypeDeser::Tome | ItemTypeDeser::Charm => {
             if namefr != *"" {
                 println!("cool tree");
-                let fr_gear = load_gear(executable_path)?;
+                let fr_gear = load_gear_cache(executable_path)?;
             }
             else if let Some(real_ids) = &json_config.ids {
                 fr_params.encode_iddata(real_ids, idsmap)?