For stems in my template, I have a group channel for each section of the orchestra, which gets it's own fx channel for reverb. I then route those two channels to a master bus (another group channel) for that section. Then I add an audio channel for that section, and set it's input as the master bus from that section, so I get the dry VI sound plus reverb. I can then just press record on the audio track and i got my stems. How that helps.