You can not include k4 of ME 2 into your clean feed.
You could just build a custom control that will transition Clean to Black....That would be another way to always get to black and then your clean feed would have that as well..
As for Removing Keys from ME 1....Well you could have it in your custom control that when you go to Replay you have an Aux Switch from Clean ME 1 to Clean ME 2....Then on the Replay out it would go from Clean ME 2 back to Clean of ME 1.
We added Bus follows in v2.1 (by the way v2.3 is on the website and v3.0 end of this week or early next week!!) with substitution tables...So you could setup an Aux Bus that will Follow the the ME 2 BKGD Bus. Then setup Substitutions that will sub in ME 1 CLN for ME 1 PGM....That would allow you to follow on the Aux and do the swaps automatically. Just make sure you make the Aux Source -- ME2 BKGD Follow.
#Graphite#Graphite#Graphite#Graphite