This is taken from uCapps midibox sequencer v3 hardware options: Which display size? For MIDIbox SEQ V3, two 2x40 LCDs are required! The menu pages won't be displayed completely on smaller LCDs, a software solution for 2x16 or 2x20 LCDs is not supported (and very hard to realize)! A single 4x40 LCD as replacement for the two 2x20 LCDs is possible, but keep in mind, that this requires to arrange the GP buttons and rotary encoders at the top and the bottom of the LCD, so that they are aligned with the 8*5 character segments of the display. Without this alignment, menu item values cannot be edited intuitively.