No problem producing an Iron Duke or Warspite. There have been good plans of both in 1916 for years.Invincible and Lion in 1916 have had zero luck. The Norman Ough Lion plans are a mishmash of several states, and is accurate for none. All of Ough's Lion models are way off. There is a superb plan set for Invincible in 1914, but none for 1916. It is hard to find a clear photo of Invincible in 1916. In fact, I know of none (there is a good one of her in 1915, which is probably the best there is).She had a most interesting enclosed compass platform, which set her off from all the other RN dreadnoughts.