The Mirror Fusion Test Facility (MFTF-B), now under construction at Lawrence Livermore National Laboratory, represents more than an order-of-magnitude step up from earlier magnetic mirror experiments on the way to a future mirror fusion reactor. In fact, when the device begins operating in 1988, it will be capable of achieving plasma performance approaching scientific breakeven for D-T equivalent operation. We have taken major steps to develop MFTF-B technologies for tandem mirrors. In the machine, we will use steady-state, high-field, superconducting magnets on reactor-elevant scales. The 30-s beam pulses, ECRH, and ICRH will also introduce near steady-state technologies into those systems.