Balun mutual inductance coupling

I'm picking a Minicircuits balun(attached) for my receiver IF path@150MHz. The receiver has 5 IF channel so there would be 5 baluns in a small space, like 2"X3". I'm a bit worry about mutual inductance coupling between these baluns. Any one has experience or suggestions on this? or nothing I need to worry about at all because of most flux would be limited in the ferrite core? Appreciated for inputs.