Love the design and have been playing around with it. I am wondering why you have 8 different sets of leg parts. How are each set different?
Note, because there are so many leg parts it is very difficult to find all the parts for a given leg. You might consider a different file naming scheme. Such as LEG_##PIECE##.stl (LEG_01_PIECE_13.stl). This would make it much easier to sort in a file browser.