FX chains

Hey guys, I have been reading as much as I can on here but I can't seem to find the answer to my main question. I have been working on an FX control mapping for my kaoss pad 3 and I have it working pretty good for the 2 FX units. However, I would like to expand it and turn traktor on to 4 FX unit mode. What I'd really like to do, is have FX unit 1 route through FX unit 3, and FX 2 through FX 4, essentially having access to 6 fx per 'block' then I'd use the mapping to turn on FX1 and 3 to that deck when the FX1 button is pressed, and FX2 and 4 to that deck when the FX2 button is pressed. It looks like something of this nature is going on with the 'instant gratification' mappings but for the life of my I can't find anything in traktor settings to permanently route FX1->FX3 and FX2->FX4.. is there a way to do this? It seems like when I switch to 4 FX unit mode all I get is FX1 is permanently assigned to deck A, and so on to FX4 assigned to deck D. So this is actually *less* functional than using 2 fx. There must be a way to daisy chain them the way I like though.. isn't there?