It looks fantastic Abbas. Great work on this. It will be fine, but as Paul mentioned pretty heavy. I doubt you needed the 1/4" ply at all for this as you are basically making a torsion box which is a tremendously strong construction even with extremely light and thin materials. No matter, this will be a wonderful table base and the extra weight will just make it that much more stable. Your blog is very thorough with excellent photos and good explanations. Even I might be willing to tackle this having your good example here.
Mike, an American living in Norway