Artificially increasing the field rotation for an RDI reduction before coadding the images does not improve the contrast significantly (see Sect. 3.3). The legend gives the total rotation of the reduction for each contrast curve. No improvement is seen at small separations (0.1–0.2″) because contrasts are not correlated with rotation angles. At larger separations, a maximum of 0.5 mag improvement is seen between the minimum and maximum rotations, 2° and 143°, but only 0.3 mag improvement between 18° and 143°.