Thank you for the recommendation! just had a look at MOC-0731, it really is a fantastic walker! and it has instructions :-)
but still, I really want to build Isogawa's eight thin legs. tried a couple of times, but there are just too many parts that I don't recognize, and I haven't figured out the the mechanisms yet, I'm still very new to legos in general.
will keep trying, and if I make any significant progress, will post photos here.