RE: Comp ARF Spitfire build
If you check out the Carf F4U1 Corsair build thread, on there they have fittedelectric retracts, Down and Locked, which are a conversion of the Sierra gear. I thinkall the Sierra CARFwarplane retracts use a similar if not the same air cylinder so maybe they can easily doa retrofit unit for the Sierra gear for a Spit. If its powerful enough for the Corsair it should be OK with the lighter spit legs/