diff --git a/glinx-core/CMakeLists.txt b/glinx-core/CMakeLists.txt
index b613402..7cda88c 100644
--- a/glinx-core/CMakeLists.txt
+++ b/glinx-core/CMakeLists.txt
@@ -4,6 +4,7 @@ project(glinx-core VERSION 0.1.0 LANGUAGES CXX)
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
+set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 
 # Compiler flags for performance
 if(MSVC)
diff --git a/glinx-core/benchmarks/throughput_bench.cpp b/glinx-core/benchmarks/throughput_bench.cpp
index 7d94f03..475e34f 100644
--- a/glinx-core/benchmarks/throughput_bench.cpp
+++ b/glinx-core/benchmarks/throughput_bench.cpp
@@ -17,7 +17,9 @@ void producer(SensorBuffer* buffer, size_t messages_per_sec) {
     std::strncpy(msg.protocol, "i2c", sizeof(msg.protocol) - 1);
     msg.payload_size = 12; // 3 x 4-byte floats
 
-    auto interval = duration<double>(1.0 / messages_per_sec);
+    auto interval = duration_cast<high_resolution_clock::duration>(
+        duration<double>(1.0 / messages_per_sec)
+    );
     auto next_send = high_resolution_clock::now();
 
     while (running.load()) {
@@ -95,10 +97,10 @@ int main(int argc, char* argv[]) {
     std::cout << "Buffer efficiency: " << ((total_consumed / static_cast<double>(total_produced)) * 100.0) << "%\n";
 
     std::cout << "\n=== Performance Targets ===\n";
-    std::cout << "Target: 10,000 msgs/sec sustained\n";
+    std::cout << "Target: " << target_rate << " msgs/sec sustained\n";
     std::cout << "Actual: " << actual_rate << " msgs/sec ";
     
-    if (actual_rate >= 10000 && loss_rate < 1.0) {
+    if (actual_rate >= (target_rate * 0.95) && loss_rate < 1.0) {
         std::cout << "✓ PASS\n";
         return 0;
     } else {
diff --git a/glinx-core/bindings/python.cpp b/glinx-core/bindings/python.cpp
index 3782926..f12e262 100644
--- a/glinx-core/bindings/python.cpp
+++ b/glinx-core/bindings/python.cpp
@@ -14,8 +14,22 @@ NB_MODULE(_glinx_core, m) {
     // SensorMessage
     nb::class_<SensorMessage>(m, "SensorMessage")
         .def(nb::init<>())
-        .def_rw("source_id", &SensorMessage::source_id)
-        .def_rw("protocol", &SensorMessage::protocol)
+        .def_prop_rw("source_id",
+            [](const SensorMessage& self) {
+                return std::string(self.source_id);
+            },
+            [](SensorMessage& self, const std::string& value) {
+                std::memset(self.source_id, 0, sizeof(self.source_id));
+                std::strncpy(self.source_id, value.c_str(), sizeof(self.source_id) - 1);
+            })
+        .def_prop_rw("protocol",
+            [](const SensorMessage& self) {
+                return std::string(self.protocol);
+            },
+            [](SensorMessage& self, const std::string& value) {
+                std::memset(self.protocol, 0, sizeof(self.protocol));
+                std::strncpy(self.protocol, value.c_str(), sizeof(self.protocol) - 1);
+            })
         .def_rw("timestamp", &SensorMessage::timestamp)
         .def_rw("payload_size", &SensorMessage::payload_size)
         .def_prop_rw("payload",
diff --git a/glinx-core/include/glinx/ipc.hpp b/glinx-core/include/glinx/ipc.hpp
index 3dcdbb5..50a4560 100644
--- a/glinx-core/include/glinx/ipc.hpp
+++ b/glinx-core/include/glinx/ipc.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include "buffer.hpp"
+#include "driver.hpp"
 #include <memory>
 #include <string>