I have been wanting a Snap On box for a long time, yesterday my dream became a reality. As I just picked up a 1997 cranberry colored 72" roll cab model number krl 1003. It is beautiful. It currently has the brass colored flat keys shaped like a pentagon. Key code is kz036. I was wanting to know if I can swap the locks over to the newer style tubular lock cylinders that use the snap n wrench key. I just love these keys. And wanted to know if it was an upgrade I could do or if it required major modification to the box or just was not possible. Thanks in advance