We have canceled the LOI of the 505 due to other specs than promised.
Endurance 3,5+ hour, not possible with 318 litre fuel and a burn rate of 125 litre an hour.
No weight and balance calculations available, we think forward cg issues.
We fly the 505 and it start very easy no much vibrations but no 125kt cruise speed at mtow.
For the money (2017 price 1.2M) not that big difference over the r66 of ec120.