Some action pictures of assembling the Arduino Mega 9DOF Bluetooth shield…. The big trick, to get the sensors on the board, is to make a mix of solder paste and flux. Get the solder as flat as possible on the sensors. After that flatten the pads on the PCB. While using a lot of flux, put some pressure on the sensors and let them sink into the solder. If you are not a experienced SMD technician “Don’t try this at home”. On the other hand, why not give it a try. For the ADXL345 and HMC5843 use the I2c-scanner to check if they are seen on the Arduino Mega. On address &H3C and &HA6 you should see both sensors. The I2c-scanner can be found on my homepage, adapt it for the Atmega1280. And about the LY530 and LPR530, when you fixed them measure the filters. You should see some 2 volts. There was a suggestion on the internet to increase the capacitor of the HMC5843, we have seen a big improvement after changing the 10 uF to 20 uF. We have added a 220 nF to the AREF of the Atmega1280. We still have to test the board as a standalone board with an SMD Atmega328p, with an Arduino bootloader.