Wham Bam Hotbox sheet holder

I love Wham Bam Hotbox for my Prusa, so I am designing various accessories for it from time to time. This time it was spring sheet holder, which accommodates all three sheets while keeping each easily accessible and which plays well with the Hotbox. As I am using official feet for it, I made exactly same system to attach the holder to the edge. I took a heavy inspiration from the similar, wall mounted holder which I found around here, so it should probably be considered a remix. 

Printed with Prusament Black ASA and because it is a large area ASA model with sharp corners, I recommend to use a brim or ears.