RE: Comp ARF Spitfire build
Make sure your dead stick was not due to poor cooling and overheating. I had the same with my zenoah 62 version which was still running in and had to work hard in this model until I enlarged the air inlet and improved baffling(see deacription and pics earlier in this thread). One thing though the Carf spit is a floater when it comes to getting out of trouble.
Cheers
Ed