Hi - I created a coffin made out of light wood and I want the lid to go up when the Trick or Treaters step on the mat going up the steps. I am not mechanically or electrically inclined. I was looking on the Monster Guts site and I saw the Monster Prop Power Pack and the Pressure Step Mat that I think will work for what I need. I cannot tell if I need something else to make them work together or not. Does anyone have any suggestions? Thanks.