The present disclosure is directed to a method for producing SWCNT from endothermic carbon-containing feedstock, such as, methane gas, using an activated alumina supported Fe:Mo catalyst. At least some part of a system that includes the iterative ECC decoder is monitored. Two laterally-spaced castor wheels 20 are disposed in another plane, which is inclined to that plane in which the castor wheels 18 are disposed, at a shorter distance on the other side of the axis, and are mounted directly on the chassis. The end panels each receive a locking rod at its respective outer side.