Looks nice so far! When I built my 1/72 models I usually drilled all they way through the lower wings, I lef these unpainted. Then installed 0,08mm fishing line rigging, I pulled it taut by hanging little clothe pegs on the ends, so they all have the same tension. Then I secured them with a drop of CA and left to dry overnight.
Then I remove the excess wire, fill and sand as needed, then maks the wing off with post-it notes and paint and decal the remaining surfaces.
I also use CA as filler on plastic kits, what really helped me with that was mixing in talcum power. It makes it less hard, but it sands equally well, even if left for a few days (don't ask...
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I can't remember where, but I also saw someone (I believe it was on Youtube somewhere) mixing in some colour pigment to make it easier to see.
Jeroen