Hey Jack, looking good bro. You may want to address the spine section, it should be flat at the sides not ramping up. Also, you may want to make the top deck thicker, the flat part at the top of the body. A word of advice would be to use pack reference photos in conjunction with the amazing wof templates. As for the piano keys, whatever works buddy. I tried two things, sanding sintra in a long length to the desired angle, then cutting out the teeth. You could also try building up some of your material at one edge and using filler and sanding that to the desired angle. I hated the piano keys, but once you get them sussed out they are pretty easy to get done.