River Plate Royal Navy Cruisers Finished

HMS Ajax

HMS Exeter

HMNZS Achilles

HMS Exeter, HMS Ajax and HMNZS Achilles are now finished and ready for action in the Battle of the River Plate, which I'm hoping to play out using Find, Fix and Strike and Nimitz at some point over the holidays. They came out alright but I'm wondering if I should add masts to my 1/3000th scale ships?