I would tend to agree.
Not sure if the Cosford example is 'early' or 'late' - built in late 1943 at Augsburg, W.Nr.420320.
Unit codes were found when the aircraft was stripped back and re-painted in it's present scheme, but no mention of re-paint internally,
and from what i saw when taking the photos of the wheel bays, gun bay etc, the paint there looked original, compared to the re-painted exterior. .