If you can honestly say that it is a ‘normal stalking aid’ then you can. Personally, I have never seen anyone stalking with one but that is just my experience.
I have seen them used by a small number of DSC1 Candidates and there have been a few problems to be honest. They take forever to set up (obviously that is down to the skill of the user) and can seriously hold up a firing detail which not very fair on other Candidates.
I have seen the wrong target shot because Candidates get so fixated on setting up the contraption that they fail to confirm the lane but this can happen anyway.
Most concerning is that Candidates can rely so heavily on the device that they fail to control the rifle, even to the point of taking their hands off it completely. I came very close to failing a Candidate for safety violations because of this on a recent course.
If you do decide to use it please make sure that you are very proficient with it and consider the points that I have made.
Lastly, I have never seen anyone shoot any better with one than the average Candidate with quad sticks or similar. The additional pressure of setting up and faffing, especially if the range isn’t perfectly level, seems to outweigh any stability advantage.