First and second rows: radial force profile of NGC 3953 and NGC 3504 with and without spherical bulge correction. The former (red line) represents the Q_T profile when the bulge flux is subtracted from the image before de-projection of the image to face-on orientation and added back afterwards for the potential calculation. For the first galaxy, the global maximum of Q_T, which corresponds to Q_b, is slightly overestimated if no correction is considered, but remains within the limits determined by the disk thickness uncertainty (black dashed lines). The visual estimate of the bar length and the effective radius of the bulge are indicated with vertical dashed lines. Third and fourth rows: comparison of Q_b measurements with and without bulge stretching correction for the galaxies with bulge in P4, with the data binned based on the disk inclination and the bulge-to-total ratio (P4). The strength of the correction is also studied in terms of the location of r_Qb with respect to the effective radius of the bulge from P4 (r_e), separating the galaxies according to their morphological class. The outliers in the third row are also indicated with larger symbols in row 4.