Need to tweak the top lips a touch more out, and use a file to round the edge of the tray edge so the primers bottom edges will not stack to prevent the primer from falling into the chute on the tilt over the edge.
Pull the primer chute, and first file any lip between the chutes channel sides and bottom edges to the primer track in the primer assembly. Then when you go to reinstall the chute to the primer assembly, on one primer in the chute, keep the handle down, pull the primer up about 3" in the chute, and let the primer free drop. If the chute is correctly indexed to the primer assembly side channel via the bottom bolt, the primer should slam against the side of the primer feed rod, and bounce back up the chute about an 1". Hence primer not bouncing back off the side of rod, means that the either the side entries to the primer assembly have not be chamfered and catching a bur, the bottom of primers channel has a nasty step lip, or the chute is not centered on the primer side channel.
O ring solves this, incase you don't tap the wad all the down in the wad assembly, so the wad ram does not tag the top of wad to bend a pedal inward of the wad.
Pre-crimper is just a touch too low since the fold line should stop on the inside top of the crimp edge, not over the top of the crimp edge instead. Also, taper crimper (bolt under the tool plate, above the spring on the crimper tool), need to be threaded down about a half more turn, to add just a hint more taper crimp to the hulls.