Right, WNW models are quite intimidating. I was also anxious when I opened my first kit. But I quickly noticed the high quality of those models which helps finally to feel comfortable. Spend time to read carefully the instructions, gather some references, and color pictures of refurbished airplanes from the Great War.
About turnbuckles and rigging; I spent a lot of time observing, thinking about how to do it, etc. and finally it went smoother than I thought.
I used the resin turnbuckles from Gaspatches models (https://www.gaspatchmodels.com/resin-turnbuckles-1-32/) and thin wire having a certain elasticity.
You have to prepare well the holes during the building of the model. Simulate the angles using a brass/metallic tube in order to align the turnbuckle with the wire. Paint your model (you can place a plastic profile in the holes to avoid paint filling them). When the model is almost finished, but the top wings are not yet fixed, glue the turnbuckles in the holes with CA glue.
Prepare a lot of little brass tubes of 2 or 3 mm long (smaller diameter the better). Perform some tests passing the wire through the turnbuckle and into the tube to finally fix it with a drop of CA glue. Have a look at this video: https://www.youtube.com/watch?v=FY-moPlWxbo.
According to models, it could be more convenient to attach the first section of the rig to the lower or upper wing before final assembly, I let you judge.
Be generous and provide enough spare wire. it will ease the future manipulation passing the wire into the second turnbuckle. Do not forget to insert the brass tube in the wire before passing the wire in the second turnbuckle.
You do not need to pull too strong the wire, gently pull the wire and glue the second section of the rig. Cut the spare wire.
When all is mounted and glued, you can paint the rigging.
Hope my explanation is clear enough.
Feel free to contact me if you would need more details 🙂