I bought a 3 pack and so far so good. Was looking at adding maybe 7 more, all feeding the same sync module. Is there any limitations, such as how many cameras can be triggered at the same time? There should be a write-up on this for those wanting a large configuration. I also don’t see where I can buy cameras in bulk (no sync modules), such as in sets of 2, 3, 4, or 5. Thanks.