I frequently shoot events (weddings) with up to four cameras. My second shooters rotate in/out and we don't always have a moment to sync our camera clocks. It would be great to be able to find several photos that were taken at the time time and have LR sync the times for all shots taken with those cameras. I would designate which camera had the 'master clock'. Currently, I have to find the images, look at the times, look at the event metadata, select each camera and change the clock for each one. Let's have a multi-cam sync!