Started: September 2019
Completed: September 2019
Released: September 2019

Instructions are available here

Instructions (free download)

PDF Instructions: A19040I(pdf instructions)
MPD file: A19040M(mpd cad file)
BSX parts list: A19040P(bsx)

Notice:
The instructions and Parts lists do not include rails.
The instructions describe only PowerFunction L-motor version.
The instructions are intended for persons who have experience assembling Lego Technic.

Update history:
February 16, 2020 :Building Instructions were made newly.