Well, I was working on my TF GS P-51 but the B-25 kept calling me.
(not good when you start hearing your planes talking to you!).

Hinges:

First picture:
Tonight I installed the Great Planes pinned hinges gpmq3972.
I put triangular grooves on both surfaces so the pin area has a place to move freely.
I use an Xacto knife to cut it and the back side to widen the slot for the hinge to slide in.

Second picture:
While putting the hinges in, I noticed that the wing tips have 'washout'.
Should help prevent some tip stalls.
(not the best of pictures but it's way past my bedtime)

Third picture:
I use small scissors to cut the fabric covering away for the hatches.
I like leaving 1/4" around the edges so the wind doesn't lift it up.
This is the aileron.

Fourth picture:
I'm using one servo in the center of the wing to control all 4 flaps.
The guide tubes are in the wings but not wire.
I'm using Sullivan Gold-n-cable #515.
This wire fits the white guide tubing perfectly.
You could also pull out the white and use the tubing that comes in #515.
There are two sets of servo covers.
One set for using servos at each flap and rudder having the traditional elongated
holes for the servo arm
The other set has small square holes for the guide tubes (I'll be using these).
Note: there is much brevity in the instruction manual.
I'm interpreting things as I see it so if I make a mistake, let me know.