When the two outermost floorboards were back in place on each side I refitted the protective coverings, as here.
I sealed the coverings completely with tape because I intend to fair, sand and paint the interior of the cabin quite soon. And I don't want dust and mess getting into the bilge.
The manual says to do this when the boat is upside down for finishing the hull bottom, but it doesn't look too challenging to do it while it's upright.
And due to pandemic limitations on public gatherings it doesn't seem likely that I will be able to flip the boat before July, so I have plenty of time for painting!