Yes, but it is usual to use 25% mean aerodynamic chord in the wind tunnel and aircraft CG for anything else
Oh dear oh dear.....!!!!
It seems that further explanation is required. There is no way I can give you what amounts to three hours of tuition on this subject on a thread such as this.
Even John Farley will be unable to do this.
However, I will try if the moderators will accept a very big post.
....(you never know, even PPop might learn something - and that should get a reponse!)......
If you are out there John................................