Now there's a coincidence!, On the model table at this very moment, and in the process of building I have two Italeri Mitchell's. The B-25 H/J and the Navy version, the PBJ -1D. Yes, they are going together very nicely, though masking up the canopies and nose glazing is a pain. One big tip, put LOTS of weight in the front, as much as you can squeeze in, there's plenty of space behind the flight deck, even behind the engines, otherwise it will forever sit on it's tail.
I also used sprue to put in a wingspar, there isn't much in the way of strength at the wing joint's. The PBJ is being built, not as a Navy plane, but as a Royal Air Force Transport Command aircraft. They were few in number, but I was inspired by a scene in the film 633 Squadron & I've always wanted to do one. Yes, I know it was actually the camera aircraft used during filming, but the colour scheme looks so good on it, and I didn't want to build just another bomber, that's the reason for the H/J model. And two kits at once isn't proving that difficult either. In case anyone wondered, Mine cost 6 pounds each in the UK, a lot cheaper than that Hasegawa kit!