I found a strange thing with this machine last night.
I had previously removed the hand wheel on the left side with a view to fitting a motor for power feed or CNC. Having fitted the Y axis DRO to the left side, I decided to put the motor on the right to avoid interference issues with the DRO. To this end, I refitted the left wheel and started to remove the right side wheel.
That's when the odd thing happened. The table started shifting left and right by significant amounts when shoved. The odd part is that didn't happen when I removed the left wheel. It's like the right hand wheel is all that's stopping the table from moving side to side.
If that's the case, cidrontmg's idea wouldn't help as the shafts aren't long enough to give the extra travel I need.