I had "assumed" that Glenn's design was a batch box... After reading through several other threads, I had planned to discard the J-tube for a batch box... "From what I've read", a batch box will have longer burns (less feeding frequency)? Within the "secondary port" design thread, I thought I had read that walker was able to get burn times as long as 2 hours? That would sure be nice. (Right now, my best is between 30 and 50 minutes when using hardwoods, from best flame/draft. down to mostly coals and maybe a few licks of flame.)
Also (after speaking with Tresa), she really liked the idea of a glass door so that we could gain the "emotional atmosphere" of a "cheery, burning fire".
Just finishing breakfast after writing down today's step-by-step agenda for working on my project... Now I have a long list of tasks to get done.