I finished up my changes to the ruleset to support magic items. I added a Weapon/armor/other toggle at the top of the sheet and the display fields alter as needed.
I also added support for dropping armor onto the weapon stat sheet and having the correct fields populate. You can see the results below.
Finally I added support for implements to be dropped onto the combat tab.
I had to make some minor changes to the phb module to support these (trim the class element of magic items, reclassify holy symbols and arcane implements).