Thank you. So, I think my main issue is the stumble at about 2700-3000 regardless if under load (driving) or in park. Slowly opening the throttle, you can watch in the carbs and see it when it starts to stumble. Maybe I need to video what I am seeing. This is why I thought there may be a loss of signal on the carbs. Stab throttle from a rolling drive to WOT, it falls on its face, then recovers and pulls until I lift. Stab to 3/4 throttle and doesn't stumble at all. This seems like accelerator pump shot. These are 50cc center squirters. I changed one brown accelerator pump cam to upside down. This will give a large quick shot from one carb and a longer shot from the other. I can't drive the car due to winter, but it seemed to respond a bit when I was moving the car. Could I be losing signal on the boosters and making the air lazy when going to WOT? It seemed better when I had a much more restrictive air filter set up.