Welcome to the forum Meridith. Being an ex Swan owner, as packed up we released the canvas from the beds and made them go in the the centre of the beds, that way as we'd roll down the roof to the half way point, we'd recheck the walls were folding in smooth. Then whilst continuing winding down just before the roof met the level of the mattress, we'd do another walk around and tuck in the walls more (be careful of the microswitch on the off side as well as the sink water neck). then simply continue to wind down and we never had a issue closing down smoothly.
Caution though, be weary on raising the roof that the sink water neck doesnt get caught in the window straps as when all folded down you cant see have it folds in, though need to be carefull on wind up.
Cheers Pace.