Ofcourse you could Zor.
But I don't wish to carry a model out to the field and stand 40 feet away from it before I've even glued the tailfeathers on!
I try to eyeball it as best I can in my build area in my study which is cramped to say the least. Then later when taxing out I might discover its not as true as I thought it was.
Don't know if this is what CGR is dealing with but I sure know the feeling.
Regards,
Clay