Quote - 4800 x 2400 is the max resolution of my printer.... if I tried to print at 10893-9337 it would prob take 2 days to render ! my missus makes me switch off at night so can only render from 8am to 10 pm (14 glorious rendering hours)

You need an IMAGE with this size, not a render. You can render mutch smaller. Just put as mutch copies as you need side-by-side with your image editor (Gimp, Photoshop, what else). Or get an image from elsewhere. You only need to make this test once. And you will see: you don't need as mutch pixels as you may think ;)

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