diff --git a/sys/BusFdoPdoCommon.hpp b/sys/BusFdoPdoCommon.hpp
new file mode 100644
index 0000000..02f5b80
--- /dev/null
+++ b/sys/BusFdoPdoCommon.hpp
@@ -0,0 +1,49 @@
+#pragma once
+
+#include <ntddk.h>
+#include <wdf.h>
+#include <ntintsafe.h>
+
+//
+// Used to identify children in the device list of the bus.
+// 
+typedef struct _PDO_IDENTIFICATION_DESCRIPTION
+{
+    WDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER Header; // should contain this header
+
+    //
+    // Unique serial number of the device on the bus
+    // 
+    ULONG SerialNo;
+
+    // 
+    // PID of the process creating this PDO
+    // 
+    DWORD OwnerProcessId;
+
+    //
+    // Device type this PDO is emulating
+    // 
+    VIGEM_TARGET_TYPE TargetType;
+
+    //
+    // If set, the vendor ID the emulated device is reporting
+    // 
+    USHORT VendorId;
+
+    //
+    // If set, the product ID the emulated device is reporting
+    // 
+    USHORT ProductId;
+
+    //
+    // Is the current device owner another driver?
+    // 
+    BOOLEAN OwnerIsDriver;
+
+    //
+    // SessionId associated with file handle.  Used to map file handles to emulated gamepad devices
+    // 
+    LONG SessionId;
+
+} PDO_IDENTIFICATION_DESCRIPTION, * PPDO_IDENTIFICATION_DESCRIPTION;
diff --git a/sys/Ds4Pdo.hpp b/sys/Ds4Pdo.hpp
index 5322c09..f54ac0f 100644
--- a/sys/Ds4Pdo.hpp
+++ b/sys/Ds4Pdo.hpp
@@ -31,19 +31,6 @@ namespace ViGEm::Bus::Targets
 	private:
 		static PCWSTR _deviceDescription;
 
-#if defined(_X86_)
-		static const int XUSB_CONFIGURATION_SIZE = 0x00E4;
-#else
-		static const int XUSB_CONFIGURATION_SIZE = 0x0130;
-#endif
-		static const int XUSB_DESCRIPTOR_SIZE = 0x0099;
-		static const int XUSB_RUMBLE_SIZE = 0x08;
-		static const int XUSB_LEDSET_SIZE = 0x03;
-		static const int XUSB_LEDNUM_SIZE = 0x01;
-		static const int XUSB_INIT_STAGE_SIZE = 0x03;
-		static const int XUSB_BLOB_STORAGE_SIZE = 0x2A;
-
-
 		static const int HID_GET_FEATURE_REPORT_SIZE_0 = 0x31;
 		static const int HID_GET_FEATURE_REPORT_SIZE_1 = 0x25;
 		static const int HID_GET_FEATURE_REPORT_MAC_ADDRESSES_SIZE = 0x10;