thanks for the link I have been following John at Air-cooled.net info on tuning with a wideband https://www.aircooled.net/how-...he-vw-flat-4-engine/ he is a wealth of knowledge but this one is not making sense to me. About 1/2 way into this he talked about going bigger with Air correction jet to bring the main in earlier.
in his summary section at the bottom he states “#6. The hole between the progression circuit and the main circuit must disappear by gradually increasing the size of the air nozzle.”
Either way I have a few air correction jets in order so I’ll give this another shot once they arrive.