I could have done a better job and have a small adjustment planned for after I move. The posts will be shifted to the outside of the tops/bottoms instead of the inside as current. This will help with the storage space.
If you have the right size dumbbells they mostly stay on. I've had several times doing arm raises with 15 pound dumbbells and they've either moved or flown off.
This was one of titans pieces that I had to fight to put together with the bolts and threading not lining up. While it features multiple push options, based on the space it took up I parted ways with this piece.