Always good to hear from you Peter. The big batch box in Idaho is burning very well and getting upgrades as the owner can get to it. My own is currently on hold and I know of another 6" batch box being prototyped locally.
Do you happen to have any insight into this particulate business? Are you aware of what the masonry heater crowd has come up with in this space?
Also, is there a way for me to learn more about this modified air intake you speak of?