Good tip on transparent cemenr, pity I already sealed mine with white glue with some troubles. For what I learned with my build the auxiliary spars were sheet metal with lightening holes and four inner rigging lines with tensioners are visible. I will post a picture as soon I will be on the home computer, later today. In retrospective I had to adjust better the seam lines between inner and outer sections of upper wing as it becomes much visible after painting and care is needed to have clean joints as paint thikness is enough to give troubles. Have fun with the building, it's a really fine model.
Ciao
Giuseppe