Logicflight Y6m - Simplest & Durable mini Drone

Logicflight is based in the beatiful city of Berlin, we build customized UAVs & do aerial research for over 2 years.
We wanted to publish our first prototype called Logicflight Y6m. It's a tricopter with motor redundancy. We kept the design as simple as possible because in the past we have built complex models from third parties and we know how painful can be to build or repair models.
For an intermediate user it might take between 2 to 4 hours to assemble this model.
Feel free to ask any