In all but the lightest air the Searunner
will do surprisingly well on the Yankee and staysail. I have sailed pretty happily without rollers on my 31 for a few years now, and I don't find myself changing sail very often. Some day I will have money
for a roller, but not right now.
I have had good luck with canvas
hank-on bags from older boats, found at swap meets. The sail stays out of the cabin
in summer, and the bags cost around $50.
If you are looking for improvements, the wind vane
from the manual has long been on my list of wants. A no-juice autopilot
that would allow one to walk around or take a leak is a thing much to be desired.