As above, first thing to do is to make sure all bits are in harmony, if you tell msd the serial number from the chip they can tell you what it is what it is for etc, they do very helpfully keep these on record, which is a great help, they'll be able to tell what other bits go with it.
As said about L1 and L6 re the screw colour, the L6 looks more silver/grubby white in colour than white most of the time.
tabetha