Machine setup:
Put 2 pins in on the 96" side.
Put sheet on table, pinning it against the 2 pins
Get your 0,0 sheet corner as close to the 0,0 mark of printable area on the table.
Print your sheet.
Once printing is done, find your printed mark on your sheet.
Get a piece of masking tape and put it right below your mark, but put the tape on the black part of your table, you do not want the tape to move.
Eye your printed mark up, and put a mark on the tape as close as you can. to being dead on.
Once you have both marks, I take a knife and put the smallest slit into the material. This is so when you flip the material over you know where your center mark is.
Flip material over the long way.
Line up the cut center mark with the drawn center mark
Make sure material is tight against pins and center marks match.
Print your file, but make sure it is flipped 180 degrees.
What this achieves is since we are pinning it on the same side we are taking out any skew the material may have, and if the material is over, or under 4', you are still printing it the same on both sides. This is also important that you have your artwork exactly centered on your sheet and in your document. If you print with the top of the board on the right side of your machine on the first side, the top of the board will be on the left side of your machine on your second side.