1) Yeah I've been meaning to share them. Message me on the forums and I can get you a copy. Otherwise I'll be putting them up on thingiverse at some point (when I'm bored and feel up to it)
2) Simplify3d is kinda a bear to use with duals. For things like support material and rafts it's great. For dual STL prints it's annoying. You need to get the models positioned perfectly as it doesn't have a "Combine" feature like cura. Then you need a second portfolio to run the second stl file.
It's definitely the most capable of.