I like the Rear mounted z braces because I got tired of the threaded rod getting hit by my clumsiness working around the prints.
I also liked the idea of the z extension. That combined with z extension and the built in spacer for the offset of the frame I built these.
I also included an stl with both of them in connected by a 1mm rod that you can clip off. It probably wasn't needed but it was put there to help keep the pieces from wobbling while printing, probably overkill but I still added it.
Use print settings from original sources.