message: uses container slot to help filter for current container
diff: },
  placeable () {
  let placeable = this.instrument().placeables.filter((p) => {
  - return p.label === this.params().placeable
  + return p.label === this.params().placeable && p.slot === this.params().slot
  })[0]
  let sanitized = ['point', 'tiprack', 'trough', 'tuberack'].filter((el) =>
  placeable.type.includes(el)
  