Custom Crafting, Pulverize Stairs

CobbleStone Stair -> 16 Gravel   (should be 24 but there is some loss)

  # -Z  Sound, Stone Break
  execute @e[type=ArmorStand,name=GM4_CustomCrafter,score_GM4_crafting_min=1]
    ~ ~ ~ playsound dig.stone @a[r=4] ~ ~ ~ 1 1.3 1

  # +Y  Result
  execute @e[type=ArmorStand,name=GM4_CustomCrafter,score_GM4_crafting_min=1]
    ~ ~ ~ blockdata ~ ~ ~ {Items:[
      {Slot:8b,id:"minecraft:gravel",Damage:0s,Count:16b}
    ]}

  # -Y Recipe
  execute @e[type=ArmorStand,name=GM4_CustomCrafter] ~ ~ ~
    testforblock ~ ~ ~ minecraft:dropper -1 {Items:[
      {Slot:4b,id:"minecraft:stone_stairs",Count:1b}
    ]}

Stone Brick Stair -> 16 Gravel   (should be 24 but there is some loss)

  # -Z  Sound, Stone Break
  execute @e[type=ArmorStand,name=GM4_CustomCrafter,score_GM4_crafting_min=1]
    ~ ~ ~ playsound dig.stone @a[r=4] ~ ~ ~ 1 1.3 1

  # +Y  Result
  execute @e[type=ArmorStand,name=GM4_CustomCrafter,score_GM4_crafting_min=1]
    ~ ~ ~ blockdata ~ ~ ~ {Items:[
      {Slot:8b,id:"minecraft:gravel",Damage:0s,Count:16b}
    ]}

  # -Y Recipe
  execute @e[type=ArmorStand,name=GM4_CustomCrafter] ~ ~ ~
    testforblock ~ ~ ~ minecraft:dropper -1 {Items:[
      {Slot:4b,id:"minecraft:stone_brick_stairs",Count:1b}
    ]}

Sandstone Stair -> 16 Sand   (should be 24 but there is some loss)

  # -Z  Sound, Stone Break
  execute @e[type=ArmorStand,name=GM4_CustomCrafter,score_GM4_crafting_min=1]
      ~ ~ ~ playsound dig.stone @a[r=4] ~ ~ ~ 1 1.3 1

  # +Y  Result
  execute @e[type=ArmorStand,name=GM4_CustomCrafter,score_GM4_crafting_min=1]
    ~ ~ ~ blockdata ~ ~ ~ {Items:[
      {Slot:8b,id:"minecraft:sand",Damage:0s,Count:16b}
    ]}

  # -Y Recipe
  execute @e[type=ArmorStand,name=GM4_CustomCrafter] ~ ~ ~
    testforblock ~ ~ ~ minecraft:dropper -1 {Items:[
      {Slot:4b,id:"minecraft:sandstone_stairs",Damage:1s,Count:1b}
    ]}

Quartz Stair -> 16 Quartz Shard   (should be 24 but there is some loss)

  # -Z  Sound, Stone Break
  execute @e[type=ArmorStand,name=GM4_CustomCrafter,score_GM4_crafting_min=1]
    ~ ~ ~ playsound dig.stone @a[r=4] ~ ~ ~ 1 1.3 1

  # +Y  Result
  execute @e[type=ArmorStand,name=GM4_CustomCrafter,score_GM4_crafting_min=1]
    ~ ~ ~ blockdata ~ ~ ~ {Items:[
      {Slot:8b,id:"minecraft:quartz",Damage:0s,Count:16b}
    ]}

  # -Y Recipe
  execute @e[type=ArmorStand,name=GM4_CustomCrafter] ~ ~ ~
    testforblock ~ ~ ~ minecraft:dropper -1 {Items:[
      {Slot:4b,id:"minecraft:quartz_stairs",Count:1b}
    ]}