About this 3D model

This piece is an adapter to fix a picatinny rail or something else The photo is the one of the first printing test, normally you have two points of attachment.(that's why I do not have the second bolt visible in the photograph) This piece that I share with you is the second version. I printed it in 200 microns.190 ° c40mm / s Tell me what improvements I could make, thank you.