Here is one i made a while back ago. Pretty exciting what you can do with a coat hanger. Didn't give me too much of a thrill, because usually 5-pin tumbler's don't give me a problem. At least ones people commonly put on their houses. It is just the plain snapper design.
I need to get a new couch.
Some tips really quick.
1. Try snapping with little force, then move up in strength of hit
2. Try with little tension at first, then move up in tension strength
3. Try about 1 to 10 times before reseting the pins again.
4. Try bouncing the tension. This has never worked for me, but it might for others.
Just some quick pointers