V3.29.0 has always worked great...castle had issues with some of the 4.0 series that caused shut down mysteries that have been corrected 3.50.10 works on my ice lite 50/ice lite 75/ and castle 60 on a bunch of airplanes as well as the 45s.I got 3 power 25 airplanes with the castle45 on v3.29.0 and 1 on the 3.50.10 and don't see any difference in performance....jim