Gaza. I only tried the fibreglass idea because I had some roof sheets available and looking outside the box decided it was an alternative. The overall box weight, both the poacher and the double bowback, is , to say the least, light. I was always looking for inexpensive ways to create a lightweight box and thinking about your comment, fibreglass construction might be the way to go. Having said that, with the decline of the rabbit, we might not need ferret boxes ffs. Jok.