I figure this will be 7"x5"x10" tall. The smallest bar (horizontal ties) are right at that magical .7cm mark. How thick should that base material be? Do you think it would require a strap going front to back across the bottom to keep it from spreading/flexing and breaking? This will be a desktop piece but somone would still be lifting the H out of it and putting it back. I have little cups under the H supported from the top. I was thinking strong flexible material. Anyhow I've never done 3d printing before and would like some feedback.