yeah, i agree - the upper set screws didn't get into the shaft holes - the lower screws are only there to help vertically center the hub on the shaft so they don't have shaft holes to go into, but the upper screws must be in the shaft holes or you will get twist, or worse, sliding up and down! - on the one-piece hub you can fly without the lower screws, but the upper ones are mandatory, and they gotta be in the shaft holes - same with the stock lower hub


edge