For dedicated use of macro photography Cambo offers a modified version of the X2-Pro monorail with an extra extended length of 150 mm over the standard length.
The gear length has also been extended to be used to the maximum extension possible.
When using a Schneider Macro Digitar 80mm, the maximum achieveable extension is 280 mm (Lens to Chip) with a recessed lensboard, allowing to reach as close as 0.11 mtr (11 cm) to the subject, and when using a Schneider Macro Digitar 120mm, the maximum achieveable extension is 300 mm (Lens to Chip) with a flat lensboard, allowing to reach as close as 0.2 mtr (20 cm) to the subject.
The Macro-option needs to be completed with a longer bellows with the correct bayonet allowing the extra 150 mm extension.
Ask your dealer for the possibilities.