SONY X70 and Tentacle

I want to sync two SONY X70 cameras and a ZOOM H4n recorder. Which hardware is required?

Am I correct in that I need three Tentacles in all, a two-kit and an additional one?

Which additional cables will I need?

Will I have to sacrifice one XLR-in on each camera, or is there another TC-in port on the SONYs?

Thank you!