I have an asymmetric, it maps onto this pretty well although 170 is not doable, 160...
when I need to sail downwind (160-160)I sheet the Genoa to the outside deck using second sheet running TI midship cleat & Saul Sing & wing. Very effective & works through a wider range before needing to gybe main. ?Haven¡¯t used parasailer but several boats in the ARC did. ?Worked well.