This rotisserie kit for my gravity 800 series would be great if it worked straight out of the box. I installed and tested and it worked. I added a chicken (keeping the first try simple) and it only turned for 30 minutes before it tightened itself as it was spinning and didn't work anymore. I found a YouTube video of a German man who had the same problem and he cut the internal piece that connected the motor to the main shaft by 5mm or so. I did the same and it has been working great since. This should not be a problem. Lucky I had a grinder and metal file to hand...