Thank you so much for taking the time to share your thoughts about our product and service. Regarding the product, we apologize for the issue with the screw-turning mechanism being loose. We will immediately look into this matter and check if there is any necessary adjustments can be made. If you could provide us with more details photos or video, it will be great. About the shipping logistics and customer happiness, we sincerely apologize for any inconvenience or dissatisfaction you may have experienced. Next time we will ask about your needs and choose a suitable shipping method to provide a more professional and satisfactory experience.