Just saw the video. Can’t believe that ladder is that expensive. Even in AUD, it is almost $100. It is also 2.5 stars, with 13 reviews. Gulp. Engineering aside (and you are right, it is pretty interesting, and some, if not most of it went over my head), the ladder is rubbish. This is the one I have. Not super, but have been with me for a while, and used quite a bit, still as good as new.

@bender@twtxt.net Yeah, it’s crazy!

Somehow, your link 403s here, but I just searched it. At least it has the diagonals at the lower two steps. However, the two upper platforms also suffer from the plastic covers, it appears (I cannot tell the material from the low quality images I found). Maybe it is aluminium? I think some joints use machine bolts, though (but again, not enough detail visible).

Happy ladder climbing!