We were looking into rocket stoves as well and we came across a manufactured one called the Zaug, zaugstoves.com
We wanted it to be off the ground and have the ability to cook on it, so instead of fiddling with making one we forked out and bought one. We invested in their newer model the Altaire and it performs awesome! My only issue with it was the top get too hot to cook directly on it, but that's an easy fix , just raise it.
In the near futur we will be working on creating a cooktop and ovens for it (cause the lid and outer cylinder come apart). All and all great product!
