Hi!
I've found that mod in the FTB Horizons Daybreaker modpack,and i found a bug with the upgrade menu.When i was trying to place iron ingots into the crafting grid,it trows through the menu like when i throw it from my inventory,so i cant make upgrades to the armour.An other problem,when is crafted the armour,i got an untextured item named item.cofh.tablet.table.name (picture below),and when i open this...it has some bugs

In order to craft the upgrades just turn off the NEI overlay by hitting O.

Thanks,its working now :D