On my cart I use MCA 208Ms, Bag not set up with multi couplers yet, but earlier config, I used MC 204s. Very robust, but i noticed filtering is only below 25 MHz - should be higher for our purposes, although interference has been minimal in my experience here in Nova Scotia, mileage may vary elsewhere. They were out long before small distros like the PSC Multi, when I was first setting up UHF distro and didn't want to bring the Lectrosonics big six pack around on portable setups.
Separate units for each antenna.