Originally Posted by Steve Collins

Good advice on engines above. Absolutely DO NOT TRUST engines that already have a bad reputation for unreliability!

However, having owned and flown the Hangar 9 B-25 which is slightly smaller, I am going to disagree with much of what has been said so far. I never had any other twin before the B-25 and found it neither hard to fly or hard to land. Certainly not more so than any other plane. What I call "pucker factor" is high with a B-25 but as soon as the pilot loosens up and realizes it isn't hard to fly or land that's when the enjoyment begins. I don't think a twin "trainer" will do anything to prepare you for the B-25 anymore than flying a cub prepares you for flying a P-40 for example. Just make sure your abilities are up to the task. I would recommend waiting a while longer than you have stated and be 100% sure of your landing skill.

I will say that, my B-25 being electric powered, I did not have the "engine out" concern that piston powered models have so if you stay with that type engine heed the previous advice concerning rudder use.