Thank you mortesv for responding so quickly. I appreciate your approval and am happy you like it.
Regarding the Y-wing
This is a topic of great debate between me and my friends and much like the question "which way does the juggernaut drive?" I don't think there is a good answer. But here is my opinion. I like to think that the Y-wing is more like 18-23 meters long, my evidence is that on the photo posted by atlas you can see that certain universal thinks change, for most, the port for the astromec, and the main guns. you may notice that the astromec on the small Y-wing is way smaller than on the Republic.
I like to think the Y-wing is bigger because of A New Hope. You may recall that the rebels knew that only small fighters would be able to penetrate their defenses, and of course, all but one Y-wing is destroyed by the DeathStar. The real reason I made mine so big was to get more detail and I think I did pretty good here are all of my designs https://drive.google.com/drive/folders/0B8JqJt7VsvQfZEF1bVR4ZlQwSjA