I'm with you on short first burns, drafts, and wick length being the big tunneling triggers, and your rescue steps are exactly what I'd do. That pick makes sense for your setup because the vessel keeps warmth and encourages a full melt pool, which is more forgiving in a drafty room and helps prevent wax clinging to the sides. I learned this the hard way after two quick burns near a window before switching to a warmer holding jar and giving the first burn enough time.
