Reply to Echo out 4 decks in native mode?

Hey Guys,

Starting to get my S4 up and running. I want to add an echo out button for all 4 decks in the native mode. Was believeing of using the loops in and out. Don't use those too much.

Ideally the Cue buttons would be the best. Nice big LEDs, each one on top of it's respective deck, etc. But those buttons are more valuable for loop recorder and of course to cue headphones.

Any ideas. Was believeing of using the encorder pushbuttons for the gain, but even with the gain encoder disabled mappings the push button is set to hold for some reason. In other words it won't toggle. It just stays on when I hold the button.

Any ideas?