I like that little screen, but its I2C address of 0x51 is REALLY annoying. Traditionally, 0x50 to 0x57 is reserved for external EEPROM chips. By setting the I2C address of this LCD to 51, I lose one slot for my EEPROM chips, and I have to rewrite code. Could I suggest you produce the next version with an I2C address that doesn't conflict with existing standards?