Do you know where your target compounds are?
Can you explain how ultra sonics are going to be effective when going after them?
See eg: Ultrasonic extraction
Nope. But you did come here asking for advice you are not able to acquire at home (France?).
Have you made any progress since Feb?
Have any clarifying question you need answered?
…but have you tried combining those two?
If this is for personal use, hash rosin is a solid suggestion