I gave it another shot yesterday. This time I increased the hydration to 70%, decreased the thickness factor to .125% and omitted the IDY completely. 24 hr room temp ferment, including about 4 hrs. in the pan, uncovered. Baked in Normas' deck oven.
I really liked this pie, especially the leftovers reheated in my toaster oven. The crumb was more open than my previous attempt, but not as light in texture. A little chewy, but in a good way, and I could really taste the Ischia culture. Oh!, and only two stripes this time!
I'll be trying this formula again in my home oven and probably the WFO as well.