I keep a hex wrench on hand, in one of the holes in the right side of the press base, sized to just fit in the primer feed hole in the shellplate. I use it to push "too high" primers back down when they occur.
Also I built
"this" to do what WmCC did with his shaved tooth pick.
One more "accessory" is sometimes handy. A 1/2" machine bolt 1" long and two nuts locked to each other at the bolt's end can be used as a spacer under the shell plate to allow you to advance the press without pushing a primer up. (it stops the forward stroke only)
The press's forward (primer feeding) stroke is just past the top position of the press handle. There are times when you don't intend to prime a case and you go a hair past "top" and a primer will move upward just a hair, enough to make the strip stop feeding. That's the most common case of needing to press a primer back down with a toothpick or hexwrench. The "spacer" above prevents going past "top".
I use the spacer and the Primer feed mod (or the cloths pin if you'd rather not build it) to get back on line fast, when I lose my concentration or get interrupted enough to cause an operator error.
I agree with WmCC on his comments on the press. As good as a Dillon, but stronger, simpler to use (especially if you change calibers), and the priming system is superior.