Hello, I am having a banding issue with my black. I'm running a mutoh 1624. I have low heat setting 31/33/50, I have tried raising the head, I have cleaned encoder, the nozzle tests look good, i tried to run at 720x720 and now i have just run at 1440 x 1440...still same thing. Printing on canvas. Dampers are all relatively new (last 8 months) any other ideas I could try? Black ink is low...but that shouldn't make a difference?