Sounds controls video patch - improvements

I have this idea of creating a versatile VJ-like patch, that allows me to set a zoom scale for incoming audio + adding other stuff where it gets affected by amplitude. I'd like to implement this in Max for live - the music being my main focus.

Use presentation view to see the relevant material to get started.

1. I still have crashes using max for live. Would you consider this patch to be a possibility without crashing all the time?
2. Should I use a qmetro instead of metro? I guess the 1 ms bang is ok.
3. I wish to have the live video - your face if you don't have a camera connected - to show up in the left jit.pwindow, and a playback video in the right. I know how to get the signal through, but i presume that there will be significant latency - in the best of all worlds there'd be no latency in this patch!
So... How do I send the signal from the jit.window to the left and then to the right jit.pwindow? Latency in the playback video isn't an issue for me as it is just a monitor.
4. When making similar patches in M4L I've experienced that the patch shows up as if in edit mode. I'd like it to show in presentation mode. Am I making a very basic mistake here?

Notice anything that is out of place or would save me some CPU do let me know - post your suggestions. Some things aren't really working yet - like the jit.brcosa - will have to look at that one!

Thanks beforehand!