All B3 or JF 17s? I think the later will require much time and is a gradual process. My hunch is it is not permanently installed due to aerodynamics?
@JamD
A vortex trail will require continuous FBW correction, consuming power etc. Unless, a mechanical or aerodynamic solution can cater it somehow but will compromise other paramters. P.S. So far I have seen circular probe w/o encapsuled in some airfoil shape.
Edit: Nope, not all are circular. Too early to say what PAF plan is. Perhaps, they wd fit it in all or for some special squardons
.