I'm hoping someone can help me,.I have a similar issue as @merman has in 2020 with the 21323, the long axle worked both ways when I tested it, until I fixed it all together. Now the little orange beam stops against the grey stop beam resulting in a beep from the battery pack (when turning counter-clockwise) it only works in the clockwise rotation. I've double checked everything and can't find anything wrong with the build. Anyone else had this issue?