What temp you cooking at? I don’t have my notes with me, but the times I’ve smoked wings with the 3D, it was 1.5-2 hours maybe, and that was at 225. At least that’s what I think it was. Hopefully someone else will chime in and be more helpful. But good call with the grill for crisping them up!
As of late, I have only went with my Kettle for wings and cook much hotter and it is about 45 minutes, thus why I can’t remember exactly.