Not familiar with the servos you are using. I used Futaba S9001's, for the ailerons, rudder and elevators. I used two on separate channels for the elevators and a Y harness for the ailerons with a single channel. I think you are using a Futaba super 8 programmable transmitter. If so, then you will have to mix the elevators to get them working together with two separate channels if you use this configuration. If memory serves me right I think I used channels 2 and 7 for the elevators.
Also,
and this is just my opinion . I purchased all new hardware. Example I used single post Dubros control horns for the ailerons, rudder and elevators. I never have been able to drill three straight holes that line up correctly when using the stock control horns. Yuk! hate them

I also used a Duros tank which I recommend if you don't want a leaky fuel tank. You will need
good large fuel line and larger copper tubes for in the tank or the 160 will not run well because the small stock copper line will starve the engine for fuel. Used 440 rods since using high torque servos. Also used metal Dubros thread-less clevises and soldered them for added strength. Used silver solder. Would also recommend using parson clips to secure all wire connections vs electrical tape or floss string that some folks use. I used an OS metal mount for the 160. Don't like those plastic adjustable mounts. You can get a very nice Dave Brown spinner that cost around 40.00 US. I think the 4" spinner is the right one. Need to check the size and will need the optional adapter to fit the spinner. Used a JR combination switch that has a charge and battery tester plug so you don't have to remove the wing each time to check your battery power or to charge the battery. The JR switch is what most in our club use because they tell me the switch connections are better than many other products. Don't want this to fail due to vibration and lose the airplane.May be wrong on this one, but it's what I have been told. Also will need a JR plug on the battery to accomidate the JR switch. I think I used a Sanyo 1100 mah battery.
Now, I learned all this from our club field director who has much more experience than I do. He taught me well and I listened to him and haven't been sorry. If you elect to use the stock hardware, that comes with the kit and many do, well, it may work and then maybe it won't. Some use the stock hardware. It cost a bit more to get the better hardware, but in the end you have a much more enjoyable airplane with less nagging problems. Again, this is my opinion, learned form those who know more.

You have to choose for yourself. .....