I like the feeling of using a 15cm more.A pair of virgins having a meeting about armaments? Well done, you two.Hmm..Doesn't look like they have their hymens though...But we haven't seen a real one yet, have we!Would a 15cm cannon be fine? Or perhaps a 20cm...Let's get some advice from Kongou-san and Shoukaku-san about the shape.This time, realism will be vital!Wanna try adding vibration capabilities too?Sounds good. I want to try out having it move forward and back on its own too.