Hallo,
I have seen that some M346 indeed do fly around without problems. I have also seen some others crash, apparently with cause unknown.
The best example indeed are the E-versions (of which one also went down, cause unknown), which, I presume have been extensively lightened (for instance no original landing gear).
The model is relatively heavy in "standard' turbine version, 16 Kg dry my both airframes, with lighting as my only option.
When you've put in thousands of euro's and months of work in preparing a (2) model(s), it's a bit frustrating to realize you've been unlucky in the "Chinese Quality Lottery".
Not to mention the possible extra damage to turbine and R/C gear. Not to mention you might be held responsible if your models' crash causes additional damage to other persons.
Regards, Christiaan