Not only check the OPF_F default, but also BLU_F is case sensitive (i.e. "blu_f" will only spawn OPF_F). I was going @!#$ nuts trying to figure out why my mil placement was dropping OPF_F in my base even when I had it set to blu_f.

I never came across a tutorial that warned about case sensitivity. Sorry if this is super obvious to long-time mission builders, but as a 3-week mission builder, I was stumped for days. If you could put that in your tutorial notes or something, I think it might save some other noobs a lot of heartache.