S4-Traktor Pro 2-Effects deck toggle
I have mapped the effects deck control to the 1s and 2s below the gain knobs on my s4. I made 3 and 4 be toggled when I hold shift on either side (modifier 5 on user map) for each deck.
This is like the default mapping I believe (not user), but it includes control for effects decks 3 and 4 for each main deck.
I can clean up and post my mapping or some screen shots if anyone is interested. Just figured I would throw out the idea.