diff --git a/doc/build/fei_server_build_notes.rst b/doc/build/fei_server_build_notes.rst
index cb87d87..d5f7f30 100644
--- a/doc/build/fei_server_build_notes.rst
+++ b/doc/build/fei_server_build_notes.rst
@@ -9,32 +9,7 @@ System Requirements
 - Python: 3.12 (required)
 
 
-User and Hostname Setup
-=======================
-
-Create a development user ``hsdev`` and facility user ``hispecfei``:
-
-.. code-block:: bash
-
-   # Create users
-   sudo adduser hsdev
-   sudo adduser hispecfei
 
-   # Add users to sudo group
-   sudo usermod -aG sudo hsdev
-   sudo usermod -aG sudo hispecfei
-
-   # Add serial access group
-   sudo usermod -aG dialout hsdev
-   sudo usermod -aG dialout hispecfei
-
-   # Set new hostname
-   sudo hostnamectl set-hostname hispecfei
-   sudo vim /etc/hosts
-
-In ``/etc/hosts`` (opened with ``vim``), change the line:
-
-.. code-block:: text
 
    127.0.1.1   old-hostname
 
diff --git a/doc/build/rtc_buildnote.rst b/doc/build/rtc_buildnote.rst
new file mode 100644
index 0000000..ffa11b2
--- /dev/null
+++ b/doc/build/rtc_buildnote.rst
@@ -0,0 +1,101 @@
+
+================================================
+System Build: TCC & Real-Time Kernel
+================================================
+
+:Authors: Elijah A-B, Dan Ech
+:Date: 2026-04-13
+:System Name: hsfei
+
+1. Prerequisites & Media Preparation
+====================================
+To ensure a clean environment, all drives were erased before starting the 
+**0% -> 100% build**.
+
+USB Drive A: Ubuntu Installer
+-----------------------------
+* **OS:** Ubuntu Server 24.04.1 LTS
+* **Source:** Official Ubuntu Download
+* **Format:** Bootable ISO
+
+USB Drive B: Cloud-Init (CIDATA)
+--------------------------------
+* **Format:** FAT32
+* **Volume Name:** ``CIDATA``
+* **Required Files (Root Directory):**
+    * ``user-data``: YAML formatted configuration file.
+    * ``meta-data``: Empty file (required for boot check).
+
+2. OS Installation (Ubuntu Server 24.04)
+========================================
+*Note: Due to issues with the automated installation, the manual method was used.*
+
+Installation Parameters
+-----------------------
+* **Language/Keyboard:** English
+* **Networking:** Ethernet connected; No Proxy.
+* **Mirror:** ``[http://us.archive.ubuntu.com/ubuntu/](http://us.archive.ubuntu.com/ubuntu/)`` (Default)
+
+Storage Configuration
+---------------------
+* **Primary Drive:** Samsung 990 Pro (1TB).
+* **Mount Points:** Temporary format of the 2TB drive as ``ext4``, mounted to ``/usr``.
+* **Note:** Software RAID 1 was bypassed; to be configured at a later stage.
+
+Credentials
+-----------
+* **Name/Server/User:** ``hsfei``
+* **Password:** ``fain'tdev``
+* **Software:** Default "Popular Snaps" selected.
+
+3. Post-Install System Hardening
+================================
+Run the following commands immediately after the first boot:
+
+System Updates
+--------------
+.. code-block:: bash
+
+    sudo apt update && sudo apt upgrade -y
+
+Enable Real-Time Kernel
+----------------------
+The Real-Time (RT) kernel requires an Ubuntu Pro subscription (using ``elijahab`` account).
+
+.. code-block:: bash
+
+    # Attach Ubuntu Pro
+    sudo pro attach [USER_TOKEN]
+
+    # Enable RT Kernel
+    sudo pro enable realtime-kernel
+
+CPU Shielding & GRUB Optimization
+---------------------------------
+To optimize performance, 6 cores were shielded to prevent background OS interference.
+
+1. Edit ``/etc/default/grub``:
+
+.. code-block:: text
+
+    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash clocksource=tsc tsc=reliable nmi_watchdog=0 nosoftlockup isolcpus=domain,0-5 rcu_nocbs=0-5 nohz_full=0-5 irqaffinity=0"
+
+2. Update GRUB and Reboot.
+
+.. tip::
+    You can now assign threads to these shielded cores (0-5) using ``taskset`` 
+    or via codebase affinity settings.
+
+4. TCC Mode (Time Coordinated Computing)
+========================================
+
+Enable Sequence
+---------------
+1. Enter BIOS -> **Enable TCC Mode**.
+2. Perform a **Double Reboot** to ensure all hardware settings are applied.
+
+5. Pending Tasks
+================
+* [ ] **Static IP Assignment:** Change from DHCP to ``192.168.29.107``.
+* [ ] **Software Stack:** Follow GitHub build notes for Python libraries, C++ sources, and hardware drivers.
+* [ ] **RAID:** Finalize hardware or software RAID 1 configuration for data drives.
\ No newline at end of file