secondary burn tubes

I have heated my house in central Nebraska for 19 yrs solely with a USSC 1500 Hotblast wood stove. It has done me well, I have seen people on here reference it as a wood hog, but I have nothing to compare to, so maybe it is. I have been exploring ways to improve efficiency, I am going to add...

this is basically an updated version of a fisher stove with a baffle and a reburn section added into the design, as well as a glass window in the side for aesthetics and ambiance. It is a little smaller on the outside than a Fisher "Momma Bear" due to the need to match to the japanese fire...