Dunno if anyone had this as an issue-and I no longer have pictures since I took it apart a while ago, but the elevator (worm drive) had problem after problem after problem for me.
Time after time, with counterweights, it was unable to lift itself (WITH an L motor), and I had to add like 3 beams along to bottom to stop the worm drive from ripping the elevator
in half.
Edit: and it STILL tried to force itself apart.
Anyone else have this as an issue?