Where are the correct MPU6050_6Axis_MotionApps20.h and I2Cdev.h files located? I've been trying for days to get openCat into my Bittle, and maybe I'm missing something easy. The IMU calibration works fine, but when I try to run OpenCat.ino, it can't find MPU6050_6Axis_MotionApps20.h or I2Cdev.h. Am running Arduino IDE 1.18.13 On gitHub I found a few versions of files with those exact names, along with various others at sites online. None seem to work with OpenCat.ino, and most every one is different from the others. Where are the correct versions of both MPU6050_6Axis_MotionApps20.h and I2Cdev.h that are required? This seems to be a common problem if you search the forums, but none of the solutions given have yet worked for me. If I can find out where the correct files are located, I can better debug what remains. It would help if ALL the dependent files could be included in the openCat download, or at the least, give links to the correct versions. many thanks, dm