I should have mentioned the reason for cutting down the shellholder anywhere from 3/8" to 1/2" is to allow the ram shellholder to set lower on the ram as it reaches for the top stroke of the press going into the swaging die.
Doing this allows you to seat the swaging die further down into the press's frame to accomodate all sizes of bullets.
Also, the Lee Classic press is not advertized as a swaging press as they don't have enough faith in their linkage base pin which are constructed in two halves that have cones. This allows the spent primers to pass through into the plastic tube.
However, I've found this is no problem so far, and even if it were to become a problem it could be readly fixed by changing out the cone pins for a one solid 1/2 inch through bolt.
I've done hundreds of swaging operations with this conversion and it has been a totally good experience.
I might also mention in the construction of the bullet ejector it has tack welds on the bottom bar to attach the ram shellholder coller, this coller also has a 1/4 inch lock bolt to hold the apparatus securely to the press's ram.
Jim