New idea for rocket heater?

So I've built my first rocket heater and I have to say it has let me down, given all of it's hype maybe I had higher expectations than normal. It was about 0 degrees on the dot one night when I tried heating my 12x12 shed with it, and it took me about 5 straight hours of feeding the stove to get it up to 50 degrees. I'm poor and my shed is uninsulated so I do face a challenge, I know this. In those 5 hours I tried dampening, pellets, normal wood, kerosene, paint thinner, and plastic. It wasn't until I used pellets and dampened the burn chamber did I see a dramatic increase in temp. by about 10 degrees which got me to the 50 mark. The rockety part of my stove burns like what I imagine it should. No smoke comes out the chimney so I believe it is burning efficiently. The weird part is and I can not figure it out is why my barrel does not radiate much heat. I thought maybe the leaks in my shed were the cause to my problem however if you put your hand a 1/4 of an inch away from the barrel it is hardly warm but the barrel itself reads well over 600. The top of the barrel as well is like this. My brother welded up a steel box with a hole for the chimney and used a cast iron door to make a woodstove, his gets so hot in his 12x14 shed that you can't stand anywhere without being intensely hot. Which made me decide to try a normal barrel stove, however I already have the rocket stove built why waste it? So my idea was to have the barrel stove on bottom and have it feed the rocket stove on top as my very detailed picture shows lol. Would this work good or would I be wasting my time? I'm not good with this stuff and there are some smart fellas on here so much thanks for the input.

Without any details about your stove it is difficult to know what the problem is. Lots of detail photos would help. One of the most likely things to cause a problem is the outlet from the barrel to the flue. It has to be LARGE to be effective.

Got to agree with Roy here. We need more info to troubleshoot.

I wouldn't try stacking a second stove on your rocket stove and I wouldn't give up on the rocket stove without taking the time to tweak it a bit first.

What are you using for thermal mass? How much? Where is the combustion taking place, can you see it? What did you use for you riser materials? Did you hang on to a list of the dimensions you used in your build? Is this your first time firing it? Are there possibly wet/frozen materials still thawing/drying out?