The good thing is they get powder coated afterward, which helps to cover tool marks. It does work for this amount, but anymore would require a different method.
It isn't really the tab length that prevents me using the vise die's as much as there being a slot on one side of the bend. Since these are milled in already before bending, it makes the part bend incorrectly. Not every time, but often enough that I don't want to do it like that. It is totally ruined if it bends or even starts to bend wrong.
These images show the bends for some models. Others are smaller and some larger. Some bent the other direction.