Wow man!! Where ya' been, livin' under a rock?? L-O-LSpider, what ever became of the "Stovace" project you were working with? If I recall you were thinking of going a different route for this season?
Installed a DAKA furnace in the house over the summer, the "stovace" was moved into the shop... and I'm still having issues with excessive coal buildup and not enough sustained heat output from that EPA firebox. I can raise the shop temperature a few degrees until the fire collapses into coals and then the shop starts cooling back off; so I add more wood and soon I just have a huge bed of coals, no more room for wood, and a cold shop... so I'm shoveling out burning coals to make more room in that POS. The DAKA furnace has been an excellent performer so far (arctic weather will be the definitive test) and actually seems to be using less wood than the EPA box did. Just a half-dozen medium-sized splits of elm brought the whole house up from 67° to 72° this morning in about an hour (26° outside this morning)... the "stovace" would have taking at least one reload (at least twice as much wood) and over three hours to do that (I could gain 1° or 2° per hour if I kept "stirring" the fire and reloading). With the DAKA I just load it and forget it... no stirring, no adjusting, no messin' 'round with it... just empty the ash pan every couple days or so.