I used a marling hitch for the lacing, with both the S17 and BR17. I left the gunter permanently rigged during away trips.
If it comes through, you can just about make out the arrangement, with a harbour furl going into Helford.
When sailing in the sea I use a cut down main . the blue line is my reefing line attached to the second reef point on the gunter. with all the guff I am VERY slow compared to you jet ski simulators.
Steve, Nona Me BR17