Seems like what the dealer told me worked well.

If your seed is getting plugged at the opening of the mini hopper, it = too much fan.

If your seed is getting plugged before the the opening of the mini hopper, it = too little fan.

Our planter does not have hoses that split, each hose is plumbed from the hopper directly to the bulk fill.  Have heard that one hose "Y'd" to fill 2 units = problems.

Hope the problem goes away.