Evolution of 30 M_⊙ primaries (donors) from models shown in Fig. 4 in the HR diagram. Letters correspond to the same events in the mass transfer evolution as before (see caption of Fig. 4 or text). Diamond (star) symbols mark the end of core H (core He) burning. These models illustrate the three main types of stable post-MS mass transfer evolution: thermal-timescale mass transfer producing hot (fully) stripped stars (top panel), thermal-timescale mass transfer producing much cooler, partially stripped stars (middle panel, case on the left-hand side), as well as binaries that evolve through phases of both thermal- and nuclear-timescale mass transfer (the remaining two models).