Studies of large-size (R = ., *, u,,,_, ,,,I.,.,.,_,..,,,.,,,,. ,.,.,,,,,,..,,,,,,_. ,..., .,,,...,,,_., ,,,,,_ ,,q, ,.m.,,,,,.,, ,,,..,m.,,,,q,_,,..i,_mt,,,ql_.HIm,,I m,,_..q_lHHIWlill_lnl'l_ll_iln n nmlmq IIImH_ __ll'ili_i'll_flqHIlaq_l _li_q_ll_m_lll_ll'_l_' }]ml I_ll_l'_i_ll_lq'll$lll_'_qll_tli_H'_l_ and superthermal electrons. Initial profile control experiments have begun using insertable biased probes and plasma guns. The toroidal field capacity of MST will be upgraded during Summer, 1993 to allow low-current tokamak operation as well as improved RFP operation.1