I added an external trans filter into the cooler line loop today. It's something I put together years ago, I just recently decided to do another run of them. It uses the Allison transmission filter with the external magnet. It also has much better filtration at 15-20 microns vs the in-pan fiber layer filter that is closer to 100 micron.
Once I got the engine speed input right and the torque convertor it works amazing. I want to take more videos, but I don't really have a good way to hold the phone and drive. Need more hands.