I did one of these for a E.P. presentation at our local Senior Center a couple of years ago. I had a volunteer build the Rocket Stove from a sketch on paper. People were amazed that the stove would actually work. I showed them the blackened brick to show that I had it fired up at one time.
I also gleaned through all of the "thrift shops" and came up with an extra slim (in height) stove burner, a small grill for hotcakes, and a rail grill for hot dogs and hamburgers. Those worked great also.
And, yes, the extra height is much better and saves your back and eyebrows too. I just disassembled it and stacked everything, bricks, half-bricks, grills, tongs, and spatulas back in a corner out of the way so I always know exactly what is ready to go if needed.
It is a good idea also to fire this up in various kinds of weather too. Rainy weather? Does it, or rather will work under a tent - or will it catch the tent on fire or melt it from the heat? Something for YOU to find out for yourself.