I use same servo set up, Hi-teck with metal arm on rudder 180oz, and JR (82oz) with plastic arms on other controls, make sure you run the system on 6V, servos work much better in large plane. I have about 10 flights on my showtime, flies well, I have Saito 100 on 30% nitro, I wish I had another 15% power, but for now OK. Watch the landing gear in the Showtime, espically if you fly from grass field. The plane is built light, NOT strong, and built for a pro flying it off a paved runway. Just one or two modest landings, and you'll pull the strut right off. guaranteed. Beef up the strut mount in the fuse, maybe add in light figerglass. The Carbon fibre struts will delaminate at the bends as well, nut thin CA will help that out.

Overall fun plane to fly, built light not strong....the gear and struts are the weak points.