It helps to have a good way to cut and drill the angled steel (I think I used 1.5" stock) and also the end caps so that you have a good center and no wobble to the drum once it is in the roaster.
It is also necessary to have some way of cutting the sheet metal. If you were to use 16 gauge stainless that is an issue and you may have to find a shop that could cut the length and width for you. However if you were to use say 20 gauge one could probably use a good pair of metal snips since it is perforated metal.
I made one 7" basket and one 8" basket so I could have some variance in the height over the heat source. It does make a difference... I cut the length of these baskets so that I had the maximum surface area in the roaster/grill.
The motor I bought from McMaster Carr http://www.mcmaster.com/#electric-motors/=aqczr can be ordered to turn from 4 rpm up to I think it is 200 rpm, but anything over 75 rpm would not have the torque to turn a drum with beans in it. I got one that turns at 20 rpm which may be a bit slow but I seem to get consistent roasts.
I know that there are people that sell these on Ebay and as far as I know they can be made to your specifications if you want... I am not sure of the costs though. I found a drum on ebay about 2 - 3 years ago and I forget if it was one a guy had bought and did not use or if it was from one of the people that made and sold them... But I remember it was going for about half the asking price of others. It was made almost identically to the way I had made mine but with 20gauge aluminum and standard galvanized steel end caps... I guess there are only so many ways to make a drum of this design.
Since I have access to a shop I took the cheapest way out.







