I'm sick of sitting so close to the wheel so i'm gonna build a 'glass box. I wanna 'glass my whole back wall (up to the sliding window) to get the most air space possible. I don't think building it will be a problem, I just can't figure out how to get a mold of the back wall. I don't wanna start with an mdf back since the whole reason of using the 'glass is to save space. so, how do I get a mold of my wall (since it's verticle)? what do I use so it'll release after it sets (wax paper, cardboard)?