I will try to explain what I did. I did not use a tape measure when building this.
Think of the whole as being 4 panels. There are two halves made of up 2 panels. Each half the panels were cut so the center(where the panels meet) is shorter than the outside of the panels.
Here's where I had to play with it. Make the angle too steep and it wants to fall over forward.
Once you get one half made and put together... I used zip ties then make your second half the same way then zip tie the two panels together.
Put the mirrored face on before you zip tie anything together.
I can't seem to let well enough alone...lol
I saw small wrinkles in my mirrored side and thought I can do that better so I tore it all apart and still don't have it put back together yet....lol
God bless,Mudd