I got a butt-load of lock-in-knob and deadbolts that are used, but all keyed alike. When I try to pick them, the slightest bit of pressure with the tension key renders the binding pin unmovable. I took one of them apart and it looks as if someone filled the keyway with WD-40 years ago and it got gummed up. So I cleaned the pins, springs and tried to get as much as possible out of the body of the plug and shell. Even after reassembly, the binding pin still refuses to budge. I don't know if it a fault of the lock or the pretend lockpicker.
Thanks,
Eric