Has anyone put one together' and what engines will work. Old one were only b40 if you did not want to do a lot of work.

Is it a good pattern plane?

Was it very difficult to change the internal hardware - leadout lines and bellcrank?  Why did they need changed?  Why did the push rod need changed?

Actually, shouldn't have said ALL hardware. The bellcrank is fine. Leadouts look good also except I don't like them being soldered. The pushrods feel like cheese, very soft metal, just like the spindly landing gear. They use nylon control horns instead of the flap and elevator joiners with integral horns. Both joiners are VERY thin wire.

How do you seal the screws in the top of the fuel tank from leaking?

If you're talking about my pic, there isn't any. The straps are soldered to the tank. 

Ok.Now with a closer look I can see that. Thanks for your reply.

P.S.- What's the hangers made from?

The brackets are a stock Brodak Part. They work very well.

My p-40 flies quite well. Os la46. I did change out all the controls Tom Morris bellcrank with carbon fiber pushrods and ball links. I stripped mine right out of the box and did silkspan and dope.