Hinges, the best, strongest are the Robarts for the 40 size planes, drill a hole the push Epoxy 30 min. in it clean it with a paper towel wet with alcohol do the same for all the rest, before you put the hing put a drop of oil on the pin to prevent the two parts from gluing together, now seal the gap with monocote, you have to do this to any plane that you are planing to fly at warp 1 to 10 to prevent fluter.

Don't forget to install a good strong servo on the control surface for a 40 size a 545 Hitec is fast, two bearings, and strong enough.

Happy flying.

CARS II