Young Gun Tip#133

Did you know?
If you have an ignition key that fits, but it won't work on your door locks you can pop this little cover off and dump the springs and tumbler pins out of it.
At this point your key will turn the lock, but unfortunately any key will.
(Or even just a small screwdriver will)

Here's the trick.
Put your key in the lock and drop a pin back into one of the holes.
If the key will turn the lock, and then the lock will not turn with the key out, then continue to the next pin.
If not, try a different length pin until the lock only turns with the key in the lock.
Keep doing the above until you have a few pins in the lock, put the springs in where the pins went in and snap the cover back on.

Now you have an ignition key that locks and unlocks the doors also.
All free except a little of your time.