Hi Alex, how are you.
Don't know about Turtle, but I am following Arna closely and staying with it.
We are waiting for DEA scheduling, which is 'imminent', but has already taken tooo long, so nerves are fraying. EU pull out could have caused a bigger confidence shake out, but only 10% decline on high volume suggest that most people anticipate DEA will do their job and finalize schedule IV and that there is big money behind this expectation.
For you, I would suggest to buy Arna at current price or a bit lower if this dea thing drags longer, and hold until DEA comes out.