matrix is solderless install on 1.0 and 1.1 and 1.6.
Some soldering will be needed to be done on the motherboard to the chip 1.2 and up for d0 execpt 1.6 since it does not have a d0 but you will need a soldering iron to remove the d0 pogo pin. Solder to the mother board will need to be done on the mother board for a 1.6 however the matrix will still screw on the motherboad and will not need to be soldered to anything. Hince the phrase solderless install.
To install a matrix on to a 1.6 folow the cheap mod rebuild of the lpc and then screw the matrix on.