[en] The ELMO Bumpy Torus (EBT) concept provides a unique basis for a steady-state fusion reactor in a favorable geometry, and it has the potential for a high power density with a significant Q value. The similarity of the dimensionless parameters of the present experiments to a reactor grade plasma and observed confinement characteristics indicates plausible extrapolations and projections for a reactor; however, there are a number of physics (as well as technology) issues to be resolved. There are difficulties in extrapolating results of simplified (and/or untested) theoretical models to an actual closely coupled, hybrid (toroidal core, hot electron ring, surface plasma, etc.) geometry. There are also uncertainties in extrapolating experimental results from low density, low temperature (low beta) plasmas to predict the behaviour of a burning plasma. Basically, the plasma physics areas that influence the operating characteristics of EBTs are the following: (1) particle orbits, equilibrium, and magnetic; (2) stability boundaries of both core and ring plasmas; (3) transport scaling; (4) heating; and (5) ring-core interaction and power balance. In addition to the ''conventional'' mode of EBT operation, innovative ideas that enhance the reactor performance include: (a) the use of supplementary (and/or trim) coils to improve confinement (and/or stability); (b) control of ambipolar potential (and its sign, i.e., positive electric field) to enhance confinement (and to be able to burn alternative fuels, i.e., D-D, etc., in a reasonably sized reactor); and (c) the possibility of ''fundamental ring'' mode heating to reduce microwave frequency requirements by a factor of 2. This paper reviews each of these areas briefly and discusses their projections to a reactor. (author)