I think the path to racing Gold time (1:25) Or (1:30) with the smallest cost is coming very soon from The World Model Company. The new "RACE" Spitfires will very soon be available from YS Performance and or World Models. We have test flown the 2 Prototypes with a box stock YS-115 and it's an easy breakout on the 1:25 at sea Level. I see many of these engines being sold used for a really good price. Just a thought.
Planebender