I used the
Spent Primer Chute (see below) from
UniqueTek for over 24 months and really appreciated it. Not only did it catch a much higher percentage of spent primers over the stock Dillon primer catch, but it also channeled all the primer "smut" away
without me having to handle it. That was a blessing because I already have liver damage, and try to stay away from handling chemicals as much as possible.
View attachment 809820
I cannot say the UniqueTek product was flawless. As with the stock Dillon catch cup, the one well-known "secret" is to extend the rear part of the cup upward with beer can or cardboard. (See below) The UniqueTek cup did extend higher than the stock unit, but could have extended as much as 3/8 to 1/2" more. The unit discussed by the OP looks like it may do just that.
All-in-all these are worthwhile products which I highly recommend for use with the 550.
.