1)the engine you are going to use will do the job if its a ucando 46

2)you wont need a y harness with the 6exa for ailerons you use channel 1 and 6 then you set the radio to flaps

3) you will need a switching harness for the rear elevators because of the install one servo is installed the oposit and the 6exa dosent have the switching capabilities.it tells you in the manual for the proper cable to use

4) i wouldnt use that servo i would just invest in the proper servo 3004 works fine from futaba also there only $20.00 or so

5)the plane has big ailerons so i suggest you set the d/r on the low rates and start there we did and it flys great then when you get more comfortable with it just flick the high rates when in the air and then HOLD ON

we installed a 46fx with a pipe and it does well in hovering chk the picks i posted on (Wheres this Modeling Hobby Going) in this forum