Tried to convert my old ender 3 to Nema 23 motors. It worked, but due to belting and the frame not being sturdy, it couldn't handle high accelerations. It has since been torn down to be repurposed for T108V3.
Small note: the real picture shows the original design for the X mount, but had to be changed due to the belt constantly slipping after a while, so I went direct. The 3D model is current.