took a quick pic.
it's an easy mod. note the shelf can be raised/lowered. it's set to the perfect height right now. the height controls the positive load on the ink supply.
just run an extra line through your machine.
remember to clean out the line after you use it. white ink shouldn't sit and dry in a line. the pigments settle and do not "melt" if you attempt to flush later. see that little tube hanging out? i sink it in a small container of acetone (no cleaning solution needed for this) and pull and push until clean.
the entire conversion from black to white takes about 15 minutes, and then another 15 minutes from white to black. it's really only a good routine if you are going to do several hours of white printing.
but for the most part it solves all the white ink issues. the expense of throwing away all the white ink, clogging, speed loss. for me it's the only way to go.
plus, since the cart is clear, you don't have to "shake" every day. just shake it when you need it. you can see when all the settled particles are blended. something you can't do with the factory cart. just bust open the factory cart and funnel it into the clear refillable.