I would definately recommend the tail wires. Keeps everything stiff. I also like the location of the pull pull, keeps the rudder nice and tight as well, and does centralize a small amount of weight.

I am running a saito now (a 1.50 even ), and I'm turning a 17 inch prop on it, and still have plenty of prop clearance. I would definately recommend threadlockin everything on the plane, including the servo horn screws (on metal output shaft servos). I had an aileron horn come off after a blender, but was able to land without incident.