About this 3D model

Screw-in wall mount at a 45 degree angle for an ikea style lamp. Used M4 bolts and nuts to secure the holder onto the base. A brace can be fastened to the underside with a small (#6 i think) screw to prevent it from sagging. I don't think this'd be a problem but I wanted to be sure. Dont come at me for the extra holes in the wall I couldn't find the stud