I recently acquired a CP16R for shooting sync sound. Will mostly be shooting live bands at an art / performance space that I work at. This is the only 16mm sync camera that we have.....So, how to make do with a mix of sync and non?
There are a couple of ways to respond to this depending on whether you already have some objectives and boundaries in place. Are you making films about small concerts? A film about a song? Does it feel like a literal record of an event? Can it be flavoured by, or even mostly about, more non literal impressions from the performance? Impressions from outside the performance? Good to think along those lines before buying more gear.
If you aren't stuck on the idea of shooting live in a literal way, meaning everything is literally from the performance /environment and in sync, then you have some freedom that you can really enjoy. Have some fun! People have been putting pictures to music in very free ways since forever. No need to go backwards. So have an intense think on what the core idea can be. Is there a creative way to use your sync camera and support that with more expressive, less literal shots from multiple MOS cameras? Do you really need to have one continuous master shot? By default, no, unless the idea for the piece required it.
You can make a plan for where that camera can be at any time, a sequence of setups. Also, hand held movements can be coreographed.
My advice is to apply some intense, fun thinking before you shoot a piece. Find some core idea that you can then apply all your basic method to. If you draw a blank on that then you may end up with your master camera on a tripod locked off the whole time. A bit sad if you have few resources. So key things that may have big impact. Are you always visually in the performance space? Are expressive visualizations allowed? Ditto for more subtle, reflective images.
If you need another sync camera, what is wrong with the non reflex CP (CPA?). It will probably have an Angenieux zoom with a prism finder and you will be stuck with that. CP16Rs are very cheap, just try to get one that's recently serviced. Or have access to a service tech. What lenses are you using on your CP16R?
PS: All questions are rhetorical except the last one.