well,i keep my traps simple, less springs the better 4 me,lol, all i do is on the door is have my door at 45 angle,on the inside of the door i have another bit of wire which comes down flat once the door has fell, this way the other bit of mesh which is attached lies flat on the floor,,up 2 you how wide you have the mesh, i only have it say 4 inches,, enough for them to stand on, so the squireel, rats, is standing on it, example being they trying to nose open the door,but cant cos they standing on the other mesh with there body weight which stops them from nosing it open,i use the cli