The oven was the result of my search for a partner for the Emberlit. It cost about the same in fact, but only available in aluminum. It does have a steel deflector plate though. I had to add the legs you see in order to make it work with the Emberlit and also my Coleman Max Micro stove. It was designed to work with remote cannister stoves or coals from a fire. It takes some fiddling to get the heat just right with the Emberlit (thus my mention of the overheat incident). Once I got the heat control down pat, it baked like a champ. They are hand made in a one-guy shop/cottage industry. Search "Bemco Backpacker Oven". It folds flat and only weighs 24 oz., but I question it's usefulness to a backpacker. For my canoe camping it is the bee's knees. Still, I like to tinker so I am going to design my own about the same size but better adapted to the Emberlit and cannister stoves.
As for starting and feeding the Emberlit, I've done it several different ways. The Coleman fire starter stick is a "cheat", but works quite well as it will sustain a fire until you have established a hot coal bed. This keeps the venturi effect going and helps combust the bigger sticks like you saw. Several times I have fed three larger sticks in at this point, completely filling the feed opening. The updraft keeps the air moving in through the vents. IMHO, it is really easier to start, feed and control the burn than with an open fire on the ground where the heat goes every which way and air comes to the fire willy-nilly from every direction. I think of it like a carburator. For playing at home or in a local park, pick up a sack of BBQ grille hickory chips meant for smoking. They are very hot burning and quite dry. You can pick out the smallet pieces or baton the larger ones into slivers if you wish.
By the way, two of the Coleman starters will boil water. But some of the wax/parrifin in them may melt and drain onto whatever surface is below the stove. I guess you could buy fireplace starter fatwood instead (at the same big box stores), but I haven't. I've done the traditional methods for many years so I don't get off on the novelty anymore. I know I can do them six ways or so, but I have an everpresent Bic, so I don't bother with birdsnests, lint, charcloth, flints and strikers or even my bison rib bone fire bow unless I am just in the mood to play.