During the process of making a skin, I've discovered a couple of things that don't work how they should. First is the label of the KSSynth, the palette command does not effect the drop shadow of the label (C MACHINE_LABEL_DROP) it works for every other machine but not for KSSynth.
Another thing is in Saw Synth, looks like there's not way to apply a custom colour to a Waveform LCD, it always white. Again, all the other machines are fine but this one has this issue.
Hope this feeback was helpfull, and sorry if it should've been posted in Skinning topic.