The update to series 3.x firmware would still require the 3.4.1 updates and the 3.4.2 fixes.
If someone could/would update Yifan Lu's Frankenstein firmware from 3.1 to 3.4.2 for the DX/DXG - - then you should have what you want.
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I recently look after a friend for six months who was blind in one eye and couldn't see out of the other.
In addition to using a DXG for reading, I took a 7 inch tablet with HDMI output that supported Bluetooth keyboard and mouse - - hooked into 46 inch HD TV as a monitor.
He could read that from across the room.
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He has since had surgery to both eyes, can see again, and "left home" on his own.