In theory, if you toe-in the verticals a little, you get some help if an engine quits. Basically, the prop blast from the one running engine will result in more airflow over the vertical on that side, and if that vertical is angled, then it gives the same result as rudder deflection. If the verticals are toe-in, then the right vertical is trying to turn the plane right, and the left vertical is trying to turn the plane left, and they cancel out if they have the same airflow. Apply asymetric airflow, and you get a yaw that works counter to the yaw of one engine out.

However, from what you've said, it's probably not worth it. And certainly the full-scale didn't do it. (probably because on the full scale, it would add a bunch of extra drag in normal flight, which would not be worth any benifits with an engine out). You'd get better scale looks from out-thrust, which is harder to see. And you said you're using a gyro.

Also, take a look at the "Twin Synch" device, if you haven't already.