Hello B-Manic I have found a good reference book for you. The title is "River Class Destroyers of the Royal Candian Navy" by Ken Macpherson. There must be a copy in your local library. Re the 3 gun fit, (she is your ship so you can fit her out how you like!), the 2 gun arrangement was much preferred, due to the fact that there was a much greater field of fire and visiblity from 'B' and 'X' mountings as they were higher up in the ship and in a heavy sea they were much easier to reload as well. Just had quick thought shipmate - I hope these nautical matters are not boring the other members!!!