Thanks for your reply. It’s no problem to make the size of your design. Do you have the CAD file? About the water resistant fabric cover, I will discuss with our R&D department. However, I would like to clarify your request of waterproof. There are two ways to make waterproof.1. Only make water repellent in fabric> If so, is it also necessary for zipper tape?2. Laminate a membrane on back side of the fabric (it still a little breathable but not very well. ) Could you let me know your opinion?