Have you ever used a newer Bourgault? Never had or seen a problem yet over 13yrs and 3 different carts.
No way Iíll of us with Bourgault carts would put up with poor distribution and we should all be seeing striping if it was a problem
Do a search online about the studies that were done on air cart distribution, and that was done by a 3rd party. There system is about the same as concord used years ago, which wasn't bad for its time.