I have a P-39 still in the box and will be starting building it sometime in the spring at the earliest as I'm working on a Pete N' Poke. I have been buying all the parts and pieces (retracts, engine...) to complete the whole plane. I am very interested in knowing how yours turns out and what kind of difficulties you run into. Please post again as you progress, or you can also email me at [email protected] . Good luck [8D]