This is the finished hole/mount...I added the small shim because with both servos in there, they are just a tad wide, and touch at the middle. The shim(1/8 liteply) took care of it perfectly...if these servos come out...I've got alot worse problems then loose servos...they aren't going anywhere....this hole set-up was done without cutting any covering except for the servo hole too.

..for the wiring....use the reversing y-harness from Horizon...EXRA325 I think is the part#. That is the easiest, most inexpensive reverser I know of, and I've used them with good results previously. Unless you have the capability to mix it in your radio...I've done that too, and do have that in my radio...Futaba does take a minimum 8ch reciever to do so though with a modern Tx like the 8UAS, or the 9C(which is what I use).
I installed a very light tube in the fusalage...right down the center to the bottom of radio compartment to run the servo extension....Don's hobby has it, and it's just for running wires like this, about $10 will get you enough for several large planes.

Now......the hor/vert stab install is a whole different thread...I was disappointed with the fit from the factory...it just wasn't going to work out of the box. The book does mention some trimming..........it just doesn't say how much. That takes some careful planning to get a perfect fit(wood to wood with no gaps) of all tail components combined. Just take your time with it....you want good solid joints in there...it's very possible, but does take a touch to get it nice, you'll see what I mean. There's where a bit of building finesse helps...I'm going with my tried and true Moki 1.80 so I want a very good fit........good luck to you..I hope this helps.