I'm doing an Xray conversion at the moment. The quality and strength of the Xray certainly impresses during the build up. Plus on the Xray you don't need to cut the servo tray, so you can always put it back to Nitro without buying any new parts.
I'm going for the 6.5 though, apparently the 4.5 gets a bit hot due to not being able to gear it low enough on anything but the RC8? 5.5 should be OK though
