There was a reason I did the motor attachement the way I did.

Whenever the Unicorn comes to a full stop suddenly, like in a crash or hard/rough landing, the kinetic forces can play havoc on the wing and/or it's components. This way the motor can move forward without causing major damage. Most of the time even without minor damage! What usually happens is that the propeller will pop of. No problem; you can just glue it back on...

Here's how I do it:


And we're of again, into the wild blue yonder...