Completed one of the irregular-shaped cushions on the boat! Went well, but required a bit of concentration because none of the foam sides were the same (i put numbers on each piece of fabric, as well as 'this way up' arrows to not get confused).
I always panic when I first put the cover on, "SHIT! Doesn't FIT...!" Then I wrestle it into the cover for 20 minutes, it settles in, and looks great.
@rek one of the things you can do to make putting cushions on a bit easier is a garbage bag and a vacuum. Effectively, put cushion in bag, suck air out. Makes it smaller so you can put it. With the bonus of adding water resistance, because the bag gets stuck. ;)