How much wood (could a woodchuck chuck)

I am finally getting around to start milling out a MP3DP and I am wondering if anyone have determined how much MDF is needed? I am planning on making a v2 so I see Ryan recomends using 3/8" thick, but how much? is a 4x8 sheet needed? 4x4?

I think I used 3 2’x2’ pieces of 1/2“ mdf.