Mark and I do a side by side comparison of the 6" J and my first batch box based off of Matt Walker's plans. I hope to start selling the batch boxes at Rocketstovecores.com in the very near future. Get in touch if you would like one.

Rocketstovecores.com

Please note the the door for the batch box, pictured at the 12:00 minute mark, should have had a 1" x 3" hole for 'primary air'. It wasn't a big deal because of all the small gaps in our stove that let air in, but if it had been well sealed up this could have led to a less than optimal burn.