total bonus no longer adding up

What is the "Perk modifier cap" set to for both of those?

i was working before messing about with i had it up to 1000 Heli damage do i have to keep it below 100% I'm only using the item perk legendary plugin, item perks is loaded but 0% to drop as I'm using epic loot. 

"Iron Bastion": {
      "Item shortname": "metal.facemask",
      "Item skin": 2919145766,
      "Restrict enhancement": false,
      "Announce in chat when this item drops for the player?": true,
      "List of perks and modifiers that the item has [perk: modifier]": {
        "Elemental": 0.1,
        "HeliDamage": 0.3

 "Skyfire": {
      "Item shortname": "lmg.m249",
      "Item skin": 2936535156,
      "Restrict enhancement": false,
      "Announce in chat when this item drops for the player?": true,
      "List of perks and modifiers that the item has [perk: modifier]": {
        "HeliDamage": 1,
        "Elemental": 0.2