All MusicomLab EFX MkII switching systems sent out from now on will be the latest v3.0.  The operating manual for the v3.0 can be accessed here http://www.moonphase.co.uk/efxmkii_manual_ver30e.pdf

Updated: A note on connecting the power supply to the EFX MkII - if using a 12Vdc supply, the +ve/-ve polarity of the barrel jack tip & sleeve DOES NOT MATTER.  The EFX MkII has a built-in full-wave rectifier so it can also accept a 9Vac supply.  Whichever type of supply you use it should be capable of delivering 400mA continuously.