Internal structure of a 5 M_⊙ ZAMS model with initial rotation frequency 20 percent of the critical frequency at the surface, computed with standard MLT (solid yellow lines) and R-MLT (dashed purple lines). Each of the nine panels shows pressure (log P), temperature (log T), density (log ρ), chemical gradient (∇_μ), actual temperature gradient (∇_T), adiabatic temperature gradient (∇_ad), Brunt-Väisälä frequency (N), mean molecular weight per particle (ions + free electrons, μ), and fractional rotation frequency (Ω/Ω_crit) as functions of fractional mass. Upper subplots show the absolute profiles for both models, and lower subplots show their relative differences, (X_{rot + R − MLT} − X_rot)/X_rot. Vertical dotted lines of the corresponding colour in the upper plots show the convective boundary for each model. Surface points have been removed for clarity.