big_htd3_lm12luu lacks information

[finalstage]

The Readme.md refers to the build documentation for the standard box (w/o a note) which is somewhat confusing.
Additionally I couldn't find anything about this big box version, seems to be the only point in the web ;) How about a part list / rod lengths?

[AxTheB]

rod lengths depend on your wanted print area and frame size, there are instructions how to calculate them: https://github.com/josefprusa/Prusa3/blob/master/box_frame/doc/dimensions.md