I don't care which looks better, just having one to fly is great.
The length to span ratio can be varied, but the area of wing to area of tailplane needs to be kept to closer proportions. If you increase the length, you can reduce the area of tailplane, but you have to get enough strength in the fuselage to carry the loads, reduce the length and you increase the tailplane area, you can go to ridiculous proportions like the old racer planes and because the length between centre of pressure of wing and tail becomes so short, the plane gets very twitchy.
The Corby is fairly short, but I have never found it twitchy. I have never dissected the design numbers to see how it compares, maybe I should do that.