rglinla

I am using a Cobra machine, which I am told can do everything great! The issue I have is that when I sew veg tan leather, I get a fine top stich, but on the underside, the leather gets dent pattern on it. This is from the pressue of the needled forcing the leather against the throat plate opening. I do not want this. I've changed needles by recommendation from the people where I bought the machine but it still does this. Does anyone have any suggestions? Thanks!