Georga Thomas : If I understand Correctly, you are very specifically talking about The Rocket Cook Stove (which
should always be used in a very well ventilated area )
Often we Get lazy and call the Rocket Mass Heater a rocket stove the way all
wood burning units get called Wood stoves.
Jay has given you good advice, This book will allow you to wrap your head around the difference between a long lasting unit, and some of the ''TinCan'' Builds that have
a life expectation measured in days !
First if you will use Cob instead of Cement/Concrete you should be able to craft a long lasting unit eventually, My Best advice Would be to Go to you-Tube and find
www.youtube.com/watch?v=P6ValmUnjz4 This is
LDS Preppers channel and if you hunt for it you will find about 3 upgrades to his original
project.
That will get you started, after that its Good work gloves and finding someone with 'Tinsnips'!
If you run into trouble come back here and we will find a way to help you ! For the Craft ! Big AL !