I haven't used the Precisa. But I can say that my most successful slides were when I embraced the idea of blown highlights and blocked shadows. By considering where to place that narrow window of three or four stops of good image exposure, you can choose to strategically employ those pure blacks or blown highlights. You can hide details that you don't want in the frame by letting them fall into blackness or whiteness, and you can work with the graphic nature of pure shadow. There is a character to the blacks on reversal film which is quite unlike anything else. When I switched from slides to neg, that was the hardest change -- losing those lustrustrous inky blacks.