Working on a coil mod as well. This one is a bit trickier than most, but should not be a problem.
I plan on first milling down the width to 7/16″, then drilling out the rivets, and removing enough laminates to get it to 7/16″ tall.
Then I will stagger cut the laminations, just off center, re assemble, and rivet them back together.
Thats the plan anyways.