Something you might want to consider is a new product by Microframe called the Sync Master. It’s both a visual time code device and SMPTE generator that jam syncs for over 8 hours with amazing accuracy. No wireless antennas like Timecode Buddy. At a fraction of the price compared to the Lockit Box, it’s a great value for syncing multiple cameras to audio in any production.
You might want to contact them about demos. I heard several weeks ago they were launching a demo campaign.
Hope this helps!
https://www.microframecorp.com/category/video-production-timer.html