Obviously the physical location of the notch makes the different sodimms or their dimm variants for that matter physically not installable in the same machines, my question are they electrically compatible ? anyone ever tried changing the notch location and seeing whether they work ?

or are the number if pins either side of the notch location always a different number as ddr1 and ddr2 sodimms look like its the same number of pins either side of the notch just that the notch is offset ? especially as ddr1 sodimms handle upto 1GB and I have some 512 ddr2 sodimms that might go in the laptop physically if it were not for the notch issue.