Nice, neat and even colour matched ! installation - r/c gear is wonderful in these modern times and relatively cheap !!
Another thought/suggestion re the cabin chopping - looking at that pretty interior it's not going to like water finding its wicked way into your electrics !
which it might if the cabs not glued and sealed in place as per instructions etc.
A trickier to build than a bog standard hatch coaming, but better waterproofing trick used in my offshore powerboat racing days,
was to sit the hatch/cabin sides in a U shaped channel, the inner side extended upwards, vertically as high as feasibly possible.
Simply built out of 1/16 ply vertical sides with a 3/16" or 1/4" square spacer to suit the thickness of your cabin sides plus paint thickness etc,
the cabin drops into the U channel and is reasonably watertight - to improve on this we fitted 1/4" square rubber gasket
glued to the top of the inner surface of the channel, this really did work well - but way over the top for Lobster Boats !