No, aside from the spiders, the mice and a squirrel have already done the damage, hence the new ductwork, the majority of it will now be metal, with small runs of flex to the ducts. When you live in the country, you use all flex at your own peril... I am laying out a welcome mat down there with DCon. New system is running me $15K, which pretty much blows away my box budget with Total Composites, but it has been 4 years now without a heat pump or A/C and I am getting low on firewood. I am looking at an alternative box over in Denver where I bought my truck, then gutting it and wiring and insulating it like Java did, but I need to get over the river to your place one of these days to see how your box looks in person and see what else you have going. I will send you an email from the other thread you started.