I had the very same problems with the post skirts cracking and we purchased our kennels in 2015. As you know it is indeed a pain to have to disassembly the kennels especially when the lower bolts seem to rust. I've sprayed them down with Blaster a penetrating spray and let it soak for a couple of days, however some of the bolts still broke off. With that being said you either have to drill an additional hole in the aluminum post and kennel walls in order to replace the screws with bolts. So a very painful repair to say the least. The new skirts do seem to be made of a better material so lets keep our fingers crossed.