Raising a fifth wheel trailer

I gained an inch with a block between the axle and spring but wouldn't consider much more then another half inch for stability and hanger integrity concerns. Even with that inch I'm in the process of adding 3 MORryde X Factor hanger supports. If I needed more height, would build a subframe and weld in as suggested earlier. With a couple earlier trailers, I did the Dexter over/under axle flips for added height but be aware that this can cause some tail wag with some trailers.