bee081 Yes. Xk123 is actually a WL toys V931 manufactured WL for HK. Use the 500mah batteries only as the larger aftermarket or xk124 were too long and I couldnt close the canopy. Dont get uprade wltoys drone batteries. Thry won't fit even if it says compatible on parts description.

bee081 Compatible with futuba fhss... fms uses futuba. I doubt stl or fsst will work. If you're a newbie to rc aircraft and want to expand into fixed wing pnp get the complete rtf kit. I bought an fms 6ch reciver and a al-3 gyro for cheap and run everything. (fixed wing too) I recommend getting the complete kit because it is 3 or 6g and has a wired collective that changes the blade angle with the amount of throttle you apply. The controller is preset. Dont touch the settings unless you know how to set up a collective pitch setup. Just switch to the little airplane icon for fixed wing set mode and the helicopter defaults are safe. There is no default recovery if you play with the (blade angle) pitch settings. This little helo is a gas. Keep in 6g mode because it is very nimble as well as it flies, hovers and lands very easily. It is too small too see for 3d flying and if you crash hard it will be COMPLETELY destroyed.