Hey thanks Brian!

In the pic below I decided to use the stitch tool to connect the whole floater-fuselage to the two new surfaces under the floater.

But the stitch tool works with a parametrizied set of surfaces, which means that both surfaces to be stitched together, "must/should" have the same number of spans/isoparms.

I had to detatch the first floater-surface I made earlier, in order to stitch the two smaller surfaces to the floater-surface.

These four surfaces had a different number of spans/isoparms, so i had to make them "equal". I could not delete any isoparms, so I inserted isoparms on every surface, so that they eventualy had the same number of spans/isoparms, roughly at the same places.