RE: U Can Do 3D .40 size
No problem with the oil. Just wipe it off. The plane is great, but don't fly it too fast. They are not made for that. They do everything you can think of and all at about 20 miles per hour. I have a OS 70 in mine and it will hover at 1/3 throttle and pull out by just hitting the gas for 2 seconds.
This thing is a blast to fly.