diff --git a/herodb/examples/circle_models_demo.rs b/herodb/examples/circle_models_demo.rs
index d634d8a..ae016f5 100644
--- a/herodb/examples/circle_models_demo.rs
+++ b/herodb/examples/circle_models_demo.rs
@@ -1,34 +1,17 @@
-use herodb::db::{DB, DBBuilder};
 use herodb::models::circle::{Circle, Member, Name, Wallet, Role, Record, RecordType};
-use std::path::Path;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    // Create a temporary directory for the database
-    let db_path = Path::new("./tmp/circle_demo");
-    if db_path.exists() {
-        std::fs::remove_dir_all(db_path)?;
-    }
-    std::fs::create_dir_all(db_path)?;
-
-    println!("Creating database at {:?}", db_path);
-
-    // Create a database with all circle models registered
-    let db = DBBuilder::new(db_path)
-        .register_model::<Circle>()
-        .register_model::<Member>()
-        .register_model::<Name>()
-        .register_model::<Wallet>()
-        .build()?;
+    println!("Circle Models Demo (In-Memory Version)");
+    println!("=====================================\n");
 
     // Create a circle
-    let mut circle = Circle::new(
+    let circle = Circle::new(
         1,
         "ThreeFold Community".to_string(),
         "A circle for ThreeFold community members".to_string(),
     );
     
     println!("Created circle: {:?}", circle);
-    db.set(&circle)?;
     
     // Create members
     let mut alice = Member::new(
@@ -48,8 +31,6 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     bob.add_email("bob@example.com".to_string());
     
     println!("Created members: {:?}, {:?}", alice, bob);
-    db.set(&alice)?;
-    db.set(&bob)?;
     
     // Create a domain name
     let mut domain = Name::new(
@@ -69,7 +50,6 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     domain.add_admin("alice_pubkey".to_string());
     
     println!("Created domain: {:?}", domain);
-    db.set(&domain)?;
     
     // Create wallets
     let mut alice_wallet = Wallet::new(
@@ -94,39 +74,27 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     bob_wallet.set_asset("TFT".to_string(), 500.0);
     
     println!("Created wallets: {:?}, {:?}", alice_wallet, bob_wallet);
-    db.set(&alice_wallet)?;
-    db.set(&bob_wallet)?;
     
     // Link wallets to members
     alice.link_wallet(alice_wallet.id);
     bob.link_wallet(bob_wallet.id);
     
-    db.set(&alice)?;
-    db.set(&bob)?;
+    println!("Linked wallets to members");
     
-    // Retrieve and display all data
-    println!("\nRetrieving data from database:");
+    // Display all data
+    println!("\nDisplaying all data:");
     
-    let circles = db.list::<Circle>()?;
-    println!("Circles: {:#?}", circles);
-    
-    let members = db.list::<Member>()?;
-    println!("Members: {:#?}", members);
-    
-    let names = db.list::<Name>()?;
-    println!("Names: {:#?}", names);
-    
-    let wallets = db.list::<Wallet>()?;
-    println!("Wallets: {:#?}", wallets);
+    println!("Circles: {:#?}", vec![circle]);
+    println!("Members: {:#?}", vec![alice.clone(), bob.clone()]);
+    println!("Names: {:#?}", vec![domain]);
+    println!("Wallets: {:#?}", vec![alice_wallet.clone(), bob_wallet.clone()]);
     
     // Demonstrate wallet operations
     println!("\nDemonstrating wallet operations:");
     
-    let mut alice_wallet = db.get::<Wallet>(1)?;
     println!("Alice's wallet before transfer: {:?}", alice_wallet);
     println!("Alice's wallet total value: {}", alice_wallet.total_value());
     
-    let mut bob_wallet = db.get::<Wallet>(2)?;
     println!("Bob's wallet before transfer: {:?}", bob_wallet);
     println!("Bob's wallet total value: {}", bob_wallet.total_value());
     
@@ -134,14 +102,9 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     alice_wallet.set_asset("TFT".to_string(), 900.0); // Decrease Alice's TFT by 100
     bob_wallet.set_asset("TFT".to_string(), 600.0);   // Increase Bob's TFT by 100
     
-    db.set(&alice_wallet)?;
-    db.set(&bob_wallet)?;
-    
-    let alice_wallet = db.get::<Wallet>(1)?;
     println!("Alice's wallet after transfer: {:?}", alice_wallet);
     println!("Alice's wallet total value: {}", alice_wallet.total_value());
     
-    let bob_wallet = db.get::<Wallet>(2)?;
     println!("Bob's wallet after transfer: {:?}", bob_wallet);
     println!("Bob's wallet total value: {}", bob_wallet.total_value());