diff --git a/src/P700Printer.cpp b/src/P700Printer.cpp
index 0ab0688..7efa210 100644
--- a/src/P700Printer.cpp
+++ b/src/P700Printer.cpp
@@ -19,32 +19,28 @@
 
 #include "P700Printer.hpp"
 
-#include <algorithm>
 #include <spdlog/spdlog.h>
 
 #include <cstdint>
-#include <iostream>
 #include <iterator>
-#include <ratio>
 #include <thread>
 #include <vector>
 
 #include "graphics/Bitmap.hpp"
-#include "graphics/Label.hpp"
 #include "graphics/Monochrome.hpp"
-#include "libusb.h"
 #include "libusbwrap/LibUsbTypes.hpp"
 #include "spdlog/fmt/bin_to_hex.h"
 
 // as long as DRYRUN is defined, no data is actually send to the printer, we need to save some tape ;)
-#define DRYRUN
+//#define DRYRUN
 
 namespace ptprnt::printer {
 
 const PrinterInfo P700Printer::mInfo = {.driverName = "P700",
                                         .name       = "Brother P-touch P700",
                                         .version    = "v1.0",
-                                        .usbId{0x04f9, 0x2061}};
+                                        .usbId{0x04f9, 0x2061},
+                                        .pixelLines = 128};
 
 P700Printer::~P700Printer() {
     detachUsbDevice();
diff --git a/src/P700Printer.hpp b/src/P700Printer.hpp
index 9c1d06e..20b2d66 100644
--- a/src/P700Printer.hpp
+++ b/src/P700Printer.hpp
@@ -20,7 +20,6 @@
 #include <spdlog/spdlog.h>
 #include <sys/types.h>
 
-#include <map>
 #include <memory>
 #include <vector>
 
@@ -81,22 +80,5 @@ class P700Printer : public ::ptprnt::IPrinterDriver {
     bool init();
 
     std::shared_ptr<libusbwrap::IUsbDevice> mUsbHndl{nullptr};
-
-    static constexpr PrinterInfo mInfo{.driverName = "P700",
-                                       .name       = "Brother P-touch P700",
-                                       .version    = "v1.0",
-                                       .vid        = 0x04f9,
-                                       .pid        = 0x2061,
-                                       .pixelLines = 128};
-    std::map<std::string, std::vector<uint8_t>> commands{
-        {"rasterstart",
-         {0x1b, 0x69, 0x61, 0x01}},  // unique for P700, other printers have the 2 byte set to 0x52 instead of 0x61
-        {"info", {0x1b, 0x69, 0x7a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
-        {"packbitson", {0x02}},
-        {"lf", {0x5a}},
-        {"ff", {0x0c}},
-        {"eject", {0x1a}},
-        {"printerinfo", {0x81}}};
 };
-
 }  // namespace ptprnt::printer
\ No newline at end of file
diff --git a/src/PtouchPrint.cpp b/src/PtouchPrint.cpp
index e9d8fa2..0e55db4 100644
--- a/src/PtouchPrint.cpp
+++ b/src/PtouchPrint.cpp
@@ -125,10 +125,10 @@ int PtouchPrint::run() {
                 break;
         }
     }
-    if (!printer->print()) {
+    /*if (!printer->print()) {
         spdlog::error("An error occured while printing");
         return -1;
-    }
+    }*/
     return 0;
 }
 
@@ -138,7 +138,7 @@ std::vector<std::shared_ptr<IPrinterDriver>> PtouchPrint::getCompatiblePrinters(
     auto driverFactory = std::make_unique<PrinterDriverFactory>();
     std::vector<std::shared_ptr<IPrinterDriver>> foundPrinterDrivers{};
 
-    for (auto usbDev : usbDevs) {
+    for (auto& usbDev : usbDevs) {
         auto driver = driverFactory->create(usbDev->getUsbId());
         if (driver != nullptr) {
             foundPrinterDrivers.push_back(driver);
diff --git a/src/libusbwrap/UsbDevice.cpp b/src/libusbwrap/UsbDevice.cpp
index 1c74b41..c3c632f 100644
--- a/src/libusbwrap/UsbDevice.cpp
+++ b/src/libusbwrap/UsbDevice.cpp
@@ -27,8 +27,7 @@
 #include "libusbwrap/interface/IUsbDevice.hpp"
 
 namespace libusbwrap {
-UsbDevice::UsbDevice(libusb_context* ctx, usbDevice_ptr dev)
-    : mLibusbCtx(ctx), mLibusbDev(std::move(dev)) {
+UsbDevice::UsbDevice(libusb_context* ctx, usbDevice_ptr dev) : mLibusbCtx(ctx), mLibusbDev(std::move(dev)) {
     if (mLibusbCtx == nullptr || mLibusbDev == nullptr) {
         throw std::invalid_argument("ctx or device are nullptr");
     }
@@ -91,13 +90,12 @@ bool UsbDevice::releaseInterface(int interfaceNo) {
     return true;
 }
 
-bool UsbDevice::bulkTransfer(uint8_t endpoint, std::vector<uint8_t>& data, int* tx,
-                             unsigned int timeout) {
+bool UsbDevice::bulkTransfer(uint8_t endpoint, const std::vector<uint8_t>& data, int* tx, unsigned int timeout) {
     // TODO: implement error handling for incomplete transactions (tx length != data length)
     int bulkTransferStatus = 0;
 
-    bulkTransferStatus =
-        libusb_bulk_transfer(mLibusbDevHandle, endpoint, data.data(), data.size(), tx, timeout);
+    bulkTransferStatus = libusb_bulk_transfer(mLibusbDevHandle, endpoint, const_cast<unsigned char*>(data.data()),
+                                              data.size(), tx, timeout);
     if (bulkTransferStatus != 0) {
         mLastError = static_cast<Error>(bulkTransferStatus);
         return false;
diff --git a/src/libusbwrap/UsbDevice.hpp b/src/libusbwrap/UsbDevice.hpp
index 02d0b25..8daa52a 100644
--- a/src/libusbwrap/UsbDevice.hpp
+++ b/src/libusbwrap/UsbDevice.hpp
@@ -20,7 +20,7 @@
 #pragma once
 
 #include <atomic>
-#include <cstddef>
+#include <memory>
 
 #include "libusb.h"
 #include "libusbwrap/LibUsbTypes.hpp"
@@ -56,8 +56,7 @@ class UsbDevice : public IUsbDevice {
     bool detachKernelDriver(int interfaceNo) override;
     bool claimInterface(int interfaceNo) override;
     bool releaseInterface(int interfaceNo) override;
-    bool bulkTransfer(uint8_t endpoint, std::vector<uint8_t>& data, int* tx,
-                      unsigned int timeout) override;
+    bool bulkTransfer(uint8_t endpoint, const std::vector<uint8_t>& data, int* tx, unsigned int timeout) override;
 
     // getters
     const usbId getUsbId() override;
diff --git a/src/libusbwrap/interface/IUsbDevice.hpp b/src/libusbwrap/interface/IUsbDevice.hpp
index e547beb..335e2ca 100644
--- a/src/libusbwrap/interface/IUsbDevice.hpp
+++ b/src/libusbwrap/interface/IUsbDevice.hpp
@@ -29,11 +29,10 @@ class IUsbDevice {
     virtual void close()  = 0;
 
     // libusb wrappers
-    virtual bool detachKernelDriver(int interfaceNo) = 0;
-    virtual bool claimInterface(int interfaceNo)     = 0;
-    virtual bool releaseInterface(int interfaceNo)   = 0;
-    virtual bool bulkTransfer(uint8_t endpoint, std::vector<uint8_t>& data, int* tx,
-                              unsigned int timeout)  = 0;
+    virtual bool detachKernelDriver(int interfaceNo)                                                             = 0;
+    virtual bool claimInterface(int interfaceNo)                                                                 = 0;
+    virtual bool releaseInterface(int interfaceNo)                                                               = 0;
+    virtual bool bulkTransfer(uint8_t endpoint, const std::vector<uint8_t>& data, int* tx, unsigned int timeout) = 0;
 
     // getters
     virtual const usbId getUsbId()         = 0;