BTW, what retracts are you going to use for your bird? I know that retracts for Corsairs, P40's etc are pretty rare to find. Most people go with Robarts, Sierra or Century Jet. I have heard good/bad reviews of all of them, but you may want to look into this as well, they seem pretty sturdy, and although China made, look pretty good!
JP Hobby 2pcs Alloy Electric Retracts gear turn 90degree for F4U airplane model JP-F4U-R for rc models Sale | wholesale - Hobby-China Co.,LTd.