Well, Jean Marc, we amateurs in this group just enjoy creating and sharing our less-than-professional pictures. I could certainly add even more criticisms to my picture if I chose to do so. The camera-to-subject distance was too little for the interaxial used which created an unnatural bending effect on the front of the gun. I'm surprised you didn't notice THAT. The picture would have been easier on the eyes if the overall range of depth had been reduced. As for the monocular disparity you mentioned, it is only noticeable on the right edge where the same stars don't appear on both images. Just one more inherent shortcoming of the anaglyph process.
I don't have an unlimited amount of time to attempt reaching perfection on every stereo that I take, especially in this case of a "fun" shot like this. I have been creating stereo photographs for years, so if a piece meets my standards, that's all that's required. If someone if going to pay me big bucks for a work, then yes, I would pay more attention to fine detail.
Duke