Torque plate
Pete - It's just my opinion but the accuracy and adjustability of the miller's cutter allows for that shortcut. They also have a Rottler CNC power honing cabinet and have used the two of them, the profilometer, and the dyno to dial in their wall finishes. I've yet to have any ring seal or oil use issues with any block they've done for me, even the couple that predate the honing cabinet. Some of those rebuilds are upwards of 50K on them now.