For VRC competition is the autoloader required to have the tightening screw installed that actually decreases the circumference of the autoloader.
Actually, the VEX Skyrise season is now over. So there is no official guidance that we can provide. That being said, during the 2014-15 Skyrise season, official events were required not to have a screw in the Autoloader. You can find more details here on how this was handled last season: