Mr. You Chen-Hsieh as you know i had a problem with a soulwolf blowing up for no reason in your 2.0 version . In the new version that seems not to be a problem anymore so far however i have had a Bird of Death blown up for no apparent reason. Apparently it is contagious. At the moment i am testing the Romulans and i must say that the Nierrh and the Griffin are excellent allthough for the Nierrh to operate good you need an engineer who is at least expert at warp and impulse technology's. I also tested the battleships of the Federation and Klingons and Romulans and i must say they are excellent. The Klingon battleship is the fastest of the 3 and also the most maneuverable , with the Romulan battleship you only have to be on the lookout cause of its wingspan so you do not run in to something and the Federation battleship is still a bit sluggish but i think that is due to having not enough room to install better impulse engines and thrusters.