My 3D printer is an FLSun 3D Cube. I really like it, I wish I had a couple more just like it, unfortunately FLSun has moved on to delta printers. The electronics aren't well laid out and, frankly used the cheapest options possible. After owning the printer for five years and trying at least three different layouts - just fucking around - I decided to do it up right.
I'm using Tinkercad to design the components and the layout. I have a public Tinkercad project with all the components I use. You can make copies of any of them here: https://www.tinkercad.com/things/edun59eY6AV-components-public/edit
