You could go with a Giraud Tri-Way Trimmer for each of the cartridges, which would be cheaper than going with the Power Trimmer and the Tri-Ways work the same way.What if you were doing 2-3 different cartridges?
The Giraud is a little bit of a hassle getting it adjusted just right, but once it's done no need for adjustment unless you change cases with difference neck thickness or ID dimensions for neck tension. For easier adjustment feature, the Trim-It II works the same way as the Giraud (same type of cutter), only much easier to adjust.