A system and method for selectively replacing one set of folding boards for another set of folding boards is provided. More specifically, the invention relates to the field of microarrayers, which are devices for autonomously depositing minute droplets of biological or chemical fluid samples in ordered arrays onto substrates. The MICR reading head is movable to a predetermined position at a predetermined distance from the end portion detected by the sensor. In one embodiment, at least one alkane-sulfonic acid comprises methane-sulfonic acid. The epoxy preferably has a cure temperature less than 140 C. The first switch permits the hard drives to be connected or disconnected from the production computer by the control computer pursuant to instructions from control software.