Hello, The MultiWII lib is used to control various multi copters using RC, IMU, motors, servos... It is currently running on Arduino platform and I have started to migrate it on ChipKit. The main difficulty porting this lib is that it is very hardware dependent using special Arduino registers and mechanisms (for example eeprom) that are different on PIC. I have made a first build Lib MuliWii on ChipKit release Alpha and I will start testing soon. I will keep you posted...