I recommend that instead of using Mirage, do a test to see whether printing directly from the Epson driver
Good advise. I tried it with the driver in Photoshop and this is what I got.
The driver doesn't allow you to use the roll feed for any "Fine Art Papers" (eg Ultra Smooth Fine Art Matte) , only "Matte Papers" (eg Archival Matte)
As soon as you take it off Archival Matte and select Ultra Smooth you get a message saying to use the front feed.
This is silly as the specs say the roll can be used for papers 0.25-0.70mm and the Hot Press Natural paper is only 0.47mm
Maybe the base material of Ultra Smooth Fine Art is thicker?