i finally got it working, my camera is still mounted higher than specified by probably 6 inches, any lower and it will be mounted to the back window of my trailer. but it finally calibrated, i can move it and re-mount but it seems to be working, the image looks a little strange near the bottom like it bends up though.
can you post a video of how yours looks in motion so i can see the difference? its working, but frankly the regular image of the rear camera is way higher quality. the transparent trailer is pixelated and seems of lower quality.