Watching build video for 1515 while assembly.. says in list you need four, 3mm spacers. Which arent included, and, aren’t needed! Lol drove me nuts for like 1/2 hour and almost called/emailed support.. watched on and realized its a typo! I am currently writting a build/referance sheet. Stuff like this is why i really kinda prefer to have a written manual over just the vids! Dont get me wrong, the videos are super awesome, wicked detailed. But can be annoying for things like just grouping parts to be assembled. Hard to pause and get info without constant rewinding and often annoying youtube ads lol