I've used Glenn's method, and one which was included in an 'Inpact' Gladiator kit, back ion the mid 1960s, which I've used since, and will be trying again soon. Their kits included a small 'bobbin' of 'invisible thread'. This was inserted into holes all the way through the wing, for example (already drilled in the kit), the stretched to the next point and so on. Once in place, the holes were glued, and the excess thead cut off.
Nowadays, with 'Superglue' around, it's much easier, as the thread can be held immediately with a small spot of the CA, and the holes filled at the same time, cutting off the 'loose ends' there and then.
As I haven't built or rigged a biplane in well over twenty years, I'll be re-starting on the SE5A (Smer) for the 56 Sqn build fairly soon, to see how it goes. Thought I'd try this simple, inexpensive kit, before I touch the Roden Gladiator, or Inpact Bulldog, both of which will have a 'silver doped' finish !
Overall, the sprue method is probably easier, although time consuming, but these days, my hands don't have the dexterity to hold a model, and try to get thin stretched sprue in between the wings! Bl**dy Arthritis!!