About this 3D model

Because 2020 profiles are widely used in DIY projects, so i designed this fastener. it's easy to print,assemble, disassemble and relocate.4 screws are used in common, not for fastening, but for strengthening the structure.M3*8mm*2 , M3*18mm*2 . Forgot to mention that the 3.7mm hole on the platform is for the M3 * 4mm thermal insert for the installation of accessories. If you need other sizes of openings, please leave a message, thank you.