Not enough tiles to carve entire work piece

Tiling limited to 6 tiles.
making a ‘ruler’ type carving, on a 3018 cnc.
As the bed in y is only 180mm and has 4 grooves for clamps I’m limited to 90mm at a time as clamps occupy the top half of the bed.
Can only do it by two programs, 10 tiles would probably work.