RE: P40 exaust stacks
LDM, you can make your own, honest. I use a product called alumalite that is sold with mold making material. You would make One stack from balsa, just the way you want it to look and cast it, over n over untill you have what you need. The casting process is pretty quick, only about 10 minutes between each cast. It's not the cheapest way to go because you will be buying the kit that contains all the stuff. I don't remember what I paid but it was in the $50-60 range. For that price you can do a fair amount of castings. Any way just something to think about. BobH.